Use Slack to send and manage messages, work with canvases, and inspect channels and users. Custom bots also support Agent Sessions and streamed trigger responses.

Credentials and workflow actions

Select an operation in the Slack block. Custom bots support the expanded channel, file, bookmark, pin, user-group, profile, workspace, List, and Canvas actions. The custom-app manifest selects all available capabilities by default. Existing apps need the updated manifest and a reinstall to grant newly added scopes.

The native Sim Slack app keeps its existing permissions. Set Bot Presence changes the selected custom bot’s presence. Mark Conversation Read moves the selected account or bot’s read cursor. Neither action changes another workspace member’s state.

List actions return one page. Use the returned cursor or page information to continue. Update User Group Members replaces the complete member list. Start List Export returns a job ID; pass it to Get List Export with the same export options. Canvas access changes apply to standalone canvases and require the link to have been shared with the recipient first.

User-token-only search, profile updates, and notification controls, Slack’s retired reminders APIs, and Enterprise administration APIs are not included. Use scheduled messages or a scheduled Sim workflow for reminders.

Stream trigger responses

Custom-bot Slack triggers can stream workflow outputs directly back into the conversation that started a run. Turn on Enable agent session (streamResponse) on a Message, App Mention, or Assistant Thread Started trigger, then select the outputs to deliver in Outputs to stream (streamOutputs).

• A selected Agent output streams immediately as it is generated. If the Agent later calls a tool, any pre-tool commentary already streamed remains visible.
• A selected non-streaming block output is sent when that block invocation completes.
• Loop and parallel invocations each create their own Slack response.
• The response status label defaults to Running and can be customized in the trigger's advanced settings.
• Optional thinking and tool-call updates appear as Slack tasks in a timeline or plan.
• Slack Agent Sessions remain in processing state for the run, return to active when it finishes, and the native Slack stop button cancels active workflow executions.

Automatic trigger responses require a custom bot created by the Slack setup wizard. They are not available with the shared Sim Slack app. Where the deployment enables shared-app triggers, the Sim app can receive its subscribed event subset without automatic streaming.

The Set Assistant Status (set_status) action changes the assistant-thread indicator; it does not enable agent-session streaming. A separate Send Message action for an output already selected on the trigger sends an additional message.

Testing a block with sample input verifies its logic. To verify a Slack integration, check the real event's deployed workflow run and any execution or delivery errors, then confirm the reply in the originating conversation or thread.

Review generated content

Review model-generated Slack messages where your communication process requires approval; model output can contain errors.

For help with the Slack integration, contact help@sim.ai.

OAuth scopes

Sim requests these scopes when someone connects a Slack account. For a self-hosted deployment, register your own app with the provider using the settings below. See Integrations and OAuth for setup.

Requested only when SLACK_EXTENDED_SCOPES and NEXT_PUBLIC_SLACK_EXTENDED_SCOPES are enabled. Enable them only after Slack approves the app for these scopes:

Some actions run only on a bot or service-account credential, never the OAuth connection. That credential needs these additional scopes:

Use the block

Build Slack workflows with messages, conversations, files, reactions, pins, bookmarks, user groups, profiles, Lists, canvases, and Agent Sessions. Operations that need additional app scopes use custom Slack bots. Lists require lists:read/lists:write and a paid Slack plan. Native Sim connections retain their existing permissions. Page through list outputs explicitly.

Actions

Slack Message

Send messages to Slack channels or direct messages. Supports Slack mrkdwn formatting.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
destinationType	string	No	Destination type: channel or dm
botToken	string	No	Bot token for Custom Bot
channel	string	No	Slack channel ID (e.g., C1234567890)
dmUserId	string	No	Slack user ID for direct messages (e.g., U1234567890)
text	string	Yes	Message text to send (supports Slack mrkdwn formatting)
threadTs	string	No	Thread timestamp to reply to (creates thread reply)
blocks	json	No	Block Kit layout blocks as a JSON array. When provided, text becomes the fallback notification text.
files	file[]	No	Files to attach to the message

Output

Parameter	Type	Description
message	object	Complete message object with all properties returned by Slack
↳ type	string	Message type (usually "message")
↳ ts	string	Message timestamp (unique identifier)
↳ text	string	Message text content
↳ user	string	User ID who sent the message
↳ bot_id	string	Bot ID if sent by a bot
↳ username	string	Display username
↳ channel	string	Channel ID
↳ team	string	Team/workspace ID
↳ thread_ts	string	Parent message timestamp (for threaded replies)
↳ parent_user_id	string	User ID of thread parent message author
↳ reply_count	number	Total number of replies in thread
↳ reply_users_count	number	Number of unique users who replied
↳ latest_reply	string	Timestamp of most recent reply
↳ subscribed	boolean	Whether user is subscribed to thread
↳ last_read	string	Timestamp of last read message
↳ unread_count	number	Number of unread messages in thread
↳ subtype	string	Message subtype (bot_message, file_share, etc.)
↳ is_starred	boolean	Whether message is starred by user
↳ pinned_to	array	Channel IDs where message is pinned
↳ permalink	string	Permanent URL to the message
↳ reactions	array	Reactions on this message
↳ name	string	Emoji name (without colons)
↳ count	number	Number of times this reaction was added
↳ users	array	Array of user IDs who reacted
↳ files	array	Files attached to the message
↳ id	string	Unique file identifier
↳ name	string	File name
↳ mimetype	string	MIME type of the file
↳ size	number	File size in bytes
↳ url_private	string	Private download URL (requires auth)
↳ permalink	string	Permanent link to the file
↳ mode	string	File mode (hosted, external, etc.)
↳ attachments	array	Legacy attachments on the message
↳ id	number	Attachment ID
↳ fallback	string	Plain text summary
↳ text	string	Main attachment text
↳ pretext	string	Text shown before attachment
↳ color	string	Color bar hex code or preset
↳ author_name	string	Author display name
↳ author_link	string	Author link URL
↳ author_icon	string	Author icon URL
↳ title	string	Attachment title
↳ title_link	string	Title link URL
↳ image_url	string	Image URL
↳ thumb_url	string	Thumbnail URL
↳ footer	string	Footer text
↳ footer_icon	string	Footer icon URL
↳ ts	string	Timestamp shown in footer
↳ blocks	array	Block Kit blocks in the message
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ edited	object	Edit information if message was edited
↳ user	string	User ID who edited the message
↳ ts	string	Timestamp of the edit
ts	string	Message timestamp
channel	string	Channel ID where message was sent
fileCount	number	Number of files uploaded (when files are attached)
files	file[]	Files attached to the message

Slack Ephemeral Message

Send an ephemeral message visible only to a specific user in a channel. Optionally reply in a thread. The message does not persist across sessions.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Slack channel ID (e.g., C1234567890)
user	string	Yes	User ID who will see the ephemeral message (e.g., U1234567890). Must be a member of the channel.
text	string	Yes	Message text to send (supports Slack mrkdwn formatting)
threadTs	string	No	Thread timestamp to reply in. When provided, the ephemeral message appears as a thread reply.
blocks	json	No	Block Kit layout blocks as a JSON array. When provided, text becomes the fallback notification text.

Output

Parameter	Type	Description
messageTs	string	Timestamp of the ephemeral message (cannot be used with chat.update)
channel	string	Channel ID where the ephemeral message was sent

Slack Canvas Writer

Create and share Slack canvases in channels. Canvases are collaborative documents within Slack.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Slack channel ID (e.g., C1234567890)
title	string	Yes	Title of the canvas
content	string	Yes	Canvas content in markdown format

Output

Parameter	Type	Description
canvas_id	string	Unique canvas identifier

Slack Message Reader

Read the latest messages from Slack channels. Retrieve conversation history with filtering options.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
destinationType	string	No	Destination type: channel or dm
botToken	string	No	Bot token for Custom Bot
channel	string	No	Slack channel ID to read messages from (e.g., C1234567890)
dmUserId	string	No	Slack user ID for DM conversation (e.g., U1234567890)
limit	number	No	Number of messages to retrieve (default: 10, max: 15)
oldest	string	No	Start of time range (timestamp)
latest	string	No	End of time range (timestamp)

Output

Parameter	Type	Description
messages	array	Array of message objects from the channel
↳ type	string	Message type (usually "message")
↳ ts	string	Message timestamp (unique identifier)
↳ text	string	Message text content
↳ user	string	User ID who sent the message
↳ bot_id	string	Bot ID if sent by a bot
↳ username	string	Display username
↳ channel	string	Channel ID
↳ team	string	Team/workspace ID
↳ thread_ts	string	Parent message timestamp (for threaded replies)
↳ parent_user_id	string	User ID of thread parent message author
↳ reply_count	number	Total number of replies in thread
↳ reply_users_count	number	Number of unique users who replied
↳ latest_reply	string	Timestamp of most recent reply
↳ subscribed	boolean	Whether user is subscribed to thread
↳ last_read	string	Timestamp of last read message
↳ unread_count	number	Number of unread messages in thread
↳ subtype	string	Message subtype (bot_message, file_share, etc.)
↳ is_starred	boolean	Whether message is starred by user
↳ pinned_to	array	Channel IDs where message is pinned
↳ permalink	string	Permanent URL to the message
↳ reactions	array	Reactions on this message
↳ name	string	Emoji name (without colons)
↳ count	number	Number of times this reaction was added
↳ users	array	Array of user IDs who reacted
↳ files	array	Files attached to the message
↳ id	string	Unique file identifier
↳ name	string	File name
↳ mimetype	string	MIME type of the file
↳ size	number	File size in bytes
↳ url_private	string	Private download URL (requires auth)
↳ permalink	string	Permanent link to the file
↳ mode	string	File mode (hosted, external, etc.)
↳ attachments	array	Legacy attachments on the message
↳ id	number	Attachment ID
↳ fallback	string	Plain text summary
↳ text	string	Main attachment text
↳ pretext	string	Text shown before attachment
↳ color	string	Color bar hex code or preset
↳ author_name	string	Author display name
↳ author_link	string	Author link URL
↳ author_icon	string	Author icon URL
↳ title	string	Attachment title
↳ title_link	string	Title link URL
↳ image_url	string	Image URL
↳ thumb_url	string	Thumbnail URL
↳ footer	string	Footer text
↳ footer_icon	string	Footer icon URL
↳ ts	string	Timestamp shown in footer
↳ blocks	array	Block Kit blocks in the message
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ edited	object	Edit information if message was edited
↳ user	string	User ID who edited the message
↳ ts	string	Timestamp of the edit

Slack Get Message

Retrieve a specific message by its timestamp. Useful for getting a thread parent message.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Slack channel ID (e.g., C1234567890)
timestamp	string	Yes	Message timestamp to retrieve (e.g., 1405894322.002768)

Output

Parameter	Type	Description
message	object	The retrieved message object
↳ type	string	Message type (usually "message")
↳ ts	string	Message timestamp (unique identifier)
↳ text	string	Message text content
↳ user	string	User ID who sent the message
↳ bot_id	string	Bot ID if sent by a bot
↳ username	string	Display username
↳ channel	string	Channel ID
↳ team	string	Team/workspace ID
↳ thread_ts	string	Parent message timestamp (for threaded replies)
↳ parent_user_id	string	User ID of thread parent message author
↳ reply_count	number	Total number of replies in thread
↳ reply_users_count	number	Number of unique users who replied
↳ latest_reply	string	Timestamp of most recent reply
↳ subscribed	boolean	Whether user is subscribed to thread
↳ last_read	string	Timestamp of last read message
↳ unread_count	number	Number of unread messages in thread
↳ subtype	string	Message subtype (bot_message, file_share, etc.)
↳ is_starred	boolean	Whether message is starred by user
↳ pinned_to	array	Channel IDs where message is pinned
↳ permalink	string	Permanent URL to the message
↳ reactions	array	Reactions on this message
↳ name	string	Emoji name (without colons)
↳ count	number	Number of times this reaction was added
↳ users	array	Array of user IDs who reacted
↳ files	array	Files attached to the message
↳ id	string	Unique file identifier
↳ name	string	File name
↳ mimetype	string	MIME type of the file
↳ size	number	File size in bytes
↳ url_private	string	Private download URL (requires auth)
↳ permalink	string	Permanent link to the file
↳ mode	string	File mode (hosted, external, etc.)
↳ attachments	array	Legacy attachments on the message
↳ id	number	Attachment ID
↳ fallback	string	Plain text summary
↳ text	string	Main attachment text
↳ pretext	string	Text shown before attachment
↳ color	string	Color bar hex code or preset
↳ author_name	string	Author display name
↳ author_link	string	Author link URL
↳ author_icon	string	Author icon URL
↳ title	string	Attachment title
↳ title_link	string	Title link URL
↳ image_url	string	Image URL
↳ thumb_url	string	Thumbnail URL
↳ footer	string	Footer text
↳ footer_icon	string	Footer icon URL
↳ ts	string	Timestamp shown in footer
↳ blocks	array	Block Kit blocks in the message
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ edited	object	Edit information if message was edited
↳ user	string	User ID who edited the message
↳ ts	string	Timestamp of the edit

Slack Get Thread

Retrieve an entire thread including the parent message and all replies. Useful for getting full conversation context.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Slack channel ID (e.g., C1234567890)
threadTs	string	Yes	Thread timestamp (thread_ts) to retrieve (e.g., 1405894322.002768)
limit	number	No	Maximum number of messages to return (default: 100, max: 200)

Output

Parameter	Type	Description
parentMessage	object	The thread parent message
↳ type	string	Message type (usually "message")
↳ ts	string	Message timestamp (unique identifier)
↳ text	string	Message text content
↳ user	string	User ID who sent the message
↳ bot_id	string	Bot ID if sent by a bot
↳ username	string	Display username
↳ channel	string	Channel ID
↳ team	string	Team/workspace ID
↳ thread_ts	string	Parent message timestamp (for threaded replies)
↳ parent_user_id	string	User ID of thread parent message author
↳ reply_count	number	Total number of replies in thread
↳ reply_users_count	number	Number of unique users who replied
↳ latest_reply	string	Timestamp of most recent reply
↳ subscribed	boolean	Whether user is subscribed to thread
↳ last_read	string	Timestamp of last read message
↳ unread_count	number	Number of unread messages in thread
↳ subtype	string	Message subtype (bot_message, file_share, etc.)
↳ is_starred	boolean	Whether message is starred by user
↳ pinned_to	array	Channel IDs where message is pinned
↳ permalink	string	Permanent URL to the message
↳ reactions	array	Reactions on this message
↳ name	string	Emoji name (without colons)
↳ count	number	Number of times this reaction was added
↳ users	array	Array of user IDs who reacted
↳ files	array	Files attached to the message
↳ id	string	Unique file identifier
↳ name	string	File name
↳ mimetype	string	MIME type of the file
↳ size	number	File size in bytes
↳ url_private	string	Private download URL (requires auth)
↳ permalink	string	Permanent link to the file
↳ mode	string	File mode (hosted, external, etc.)
↳ attachments	array	Legacy attachments on the message
↳ id	number	Attachment ID
↳ fallback	string	Plain text summary
↳ text	string	Main attachment text
↳ pretext	string	Text shown before attachment
↳ color	string	Color bar hex code or preset
↳ author_name	string	Author display name
↳ author_link	string	Author link URL
↳ author_icon	string	Author icon URL
↳ title	string	Attachment title
↳ title_link	string	Title link URL
↳ image_url	string	Image URL
↳ thumb_url	string	Thumbnail URL
↳ footer	string	Footer text
↳ footer_icon	string	Footer icon URL
↳ ts	string	Timestamp shown in footer
↳ blocks	array	Block Kit blocks in the message
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ edited	object	Edit information if message was edited
↳ user	string	User ID who edited the message
↳ ts	string	Timestamp of the edit
replies	array	Array of reply messages in the thread (excluding the parent)
↳ type	string	Message type (usually "message")
↳ ts	string	Message timestamp (unique identifier)
↳ text	string	Message text content
↳ user	string	User ID who sent the message
↳ bot_id	string	Bot ID if sent by a bot
↳ username	string	Display username
↳ channel	string	Channel ID
↳ team	string	Team/workspace ID
↳ thread_ts	string	Parent message timestamp (for threaded replies)
↳ parent_user_id	string	User ID of thread parent message author
↳ reply_count	number	Total number of replies in thread
↳ reply_users_count	number	Number of unique users who replied
↳ latest_reply	string	Timestamp of most recent reply
↳ subscribed	boolean	Whether user is subscribed to thread
↳ last_read	string	Timestamp of last read message
↳ unread_count	number	Number of unread messages in thread
↳ subtype	string	Message subtype (bot_message, file_share, etc.)
↳ is_starred	boolean	Whether message is starred by user
↳ pinned_to	array	Channel IDs where message is pinned
↳ permalink	string	Permanent URL to the message
↳ reactions	array	Reactions on this message
↳ name	string	Emoji name (without colons)
↳ count	number	Number of times this reaction was added
↳ users	array	Array of user IDs who reacted
↳ files	array	Files attached to the message
↳ id	string	Unique file identifier
↳ name	string	File name
↳ mimetype	string	MIME type of the file
↳ size	number	File size in bytes
↳ url_private	string	Private download URL (requires auth)
↳ permalink	string	Permanent link to the file
↳ mode	string	File mode (hosted, external, etc.)
↳ attachments	array	Legacy attachments on the message
↳ id	number	Attachment ID
↳ fallback	string	Plain text summary
↳ text	string	Main attachment text
↳ pretext	string	Text shown before attachment
↳ color	string	Color bar hex code or preset
↳ author_name	string	Author display name
↳ author_link	string	Author link URL
↳ author_icon	string	Author icon URL
↳ title	string	Attachment title
↳ title_link	string	Title link URL
↳ image_url	string	Image URL
↳ thumb_url	string	Thumbnail URL
↳ footer	string	Footer text
↳ footer_icon	string	Footer icon URL
↳ ts	string	Timestamp shown in footer
↳ blocks	array	Block Kit blocks in the message
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ edited	object	Edit information if message was edited
↳ user	string	User ID who edited the message
↳ ts	string	Timestamp of the edit
messages	array	All messages in the thread (parent + replies) in chronological order
↳ type	string	Message type (usually "message")
↳ ts	string	Message timestamp (unique identifier)
↳ text	string	Message text content
↳ user	string	User ID who sent the message
↳ bot_id	string	Bot ID if sent by a bot
↳ username	string	Display username
↳ channel	string	Channel ID
↳ team	string	Team/workspace ID
↳ thread_ts	string	Parent message timestamp (for threaded replies)
↳ parent_user_id	string	User ID of thread parent message author
↳ reply_count	number	Total number of replies in thread
↳ reply_users_count	number	Number of unique users who replied
↳ latest_reply	string	Timestamp of most recent reply
↳ subscribed	boolean	Whether user is subscribed to thread
↳ last_read	string	Timestamp of last read message
↳ unread_count	number	Number of unread messages in thread
↳ subtype	string	Message subtype (bot_message, file_share, etc.)
↳ is_starred	boolean	Whether message is starred by user
↳ pinned_to	array	Channel IDs where message is pinned
↳ permalink	string	Permanent URL to the message
↳ reactions	array	Reactions on this message
↳ name	string	Emoji name (without colons)
↳ count	number	Number of times this reaction was added
↳ users	array	Array of user IDs who reacted
↳ files	array	Files attached to the message
↳ id	string	Unique file identifier
↳ name	string	File name
↳ mimetype	string	MIME type of the file
↳ size	number	File size in bytes
↳ url_private	string	Private download URL (requires auth)
↳ permalink	string	Permanent link to the file
↳ mode	string	File mode (hosted, external, etc.)
↳ attachments	array	Legacy attachments on the message
↳ id	number	Attachment ID
↳ fallback	string	Plain text summary
↳ text	string	Main attachment text
↳ pretext	string	Text shown before attachment
↳ color	string	Color bar hex code or preset
↳ author_name	string	Author display name
↳ author_link	string	Author link URL
↳ author_icon	string	Author icon URL
↳ title	string	Attachment title
↳ title_link	string	Title link URL
↳ image_url	string	Image URL
↳ thumb_url	string	Thumbnail URL
↳ footer	string	Footer text
↳ footer_icon	string	Footer icon URL
↳ ts	string	Timestamp shown in footer
↳ blocks	array	Block Kit blocks in the message
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ edited	object	Edit information if message was edited
↳ user	string	User ID who edited the message
↳ ts	string	Timestamp of the edit
replyCount	number	Number of replies returned in this response
hasMore	boolean	Whether there are more messages in the thread (pagination needed)

Slack Get Thread Replies

Fetch every message in a Slack thread, automatically following pagination across all pages. Returns the parent message and the full set of replies.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Slack channel ID containing the thread (e.g., C1234567890)
threadTs	string	Yes	Thread timestamp (thread_ts) of the parent message (e.g., 1405894322.002768)
oldest	string	No	Only include replies after this Unix timestamp (seconds)
latest	string	No	Only include replies before this Unix timestamp (seconds)
inclusive	boolean	No	Include messages with timestamps matching oldest or latest (default: false)
limit	number	No	Messages to request per page (default: 200, max: 999)
cursor	string	No	Pagination cursor from a previous response.nextCursor to resume from
maxPages	number	No	Maximum number of pages to fetch before stopping (default: 10)

Output

Parameter	Type	Description
parentMessage	object	The thread parent message, or null if the thread is empty
↳ type	string	Message type (usually "message")
↳ ts	string	Message timestamp (unique identifier)
↳ text	string	Message text content
↳ user	string	User ID who sent the message
↳ bot_id	string	Bot ID if sent by a bot
↳ username	string	Display username
↳ channel	string	Channel ID
↳ team	string	Team/workspace ID
↳ thread_ts	string	Parent message timestamp (for threaded replies)
↳ parent_user_id	string	User ID of thread parent message author
↳ reply_count	number	Total number of replies in thread
↳ reply_users_count	number	Number of unique users who replied
↳ latest_reply	string	Timestamp of most recent reply
↳ subscribed	boolean	Whether user is subscribed to thread
↳ last_read	string	Timestamp of last read message
↳ unread_count	number	Number of unread messages in thread
↳ subtype	string	Message subtype (bot_message, file_share, etc.)
↳ is_starred	boolean	Whether message is starred by user
↳ pinned_to	array	Channel IDs where message is pinned
↳ permalink	string	Permanent URL to the message
↳ reactions	array	Reactions on this message
↳ name	string	Emoji name (without colons)
↳ count	number	Number of times this reaction was added
↳ users	array	Array of user IDs who reacted
↳ files	array	Files attached to the message
↳ id	string	Unique file identifier
↳ name	string	File name
↳ mimetype	string	MIME type of the file
↳ size	number	File size in bytes
↳ url_private	string	Private download URL (requires auth)
↳ permalink	string	Permanent link to the file
↳ mode	string	File mode (hosted, external, etc.)
↳ attachments	array	Legacy attachments on the message
↳ id	number	Attachment ID
↳ fallback	string	Plain text summary
↳ text	string	Main attachment text
↳ pretext	string	Text shown before attachment
↳ color	string	Color bar hex code or preset
↳ author_name	string	Author display name
↳ author_link	string	Author link URL
↳ author_icon	string	Author icon URL
↳ title	string	Attachment title
↳ title_link	string	Title link URL
↳ image_url	string	Image URL
↳ thumb_url	string	Thumbnail URL
↳ footer	string	Footer text
↳ footer_icon	string	Footer icon URL
↳ ts	string	Timestamp shown in footer
↳ blocks	array	Block Kit blocks in the message
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ edited	object	Edit information if message was edited
↳ user	string	User ID who edited the message
↳ ts	string	Timestamp of the edit
replies	array	All reply messages in the thread (excluding the parent)
↳ type	string	Message type (usually "message")
↳ ts	string	Message timestamp (unique identifier)
↳ text	string	Message text content
↳ user	string	User ID who sent the message
↳ bot_id	string	Bot ID if sent by a bot
↳ username	string	Display username
↳ channel	string	Channel ID
↳ team	string	Team/workspace ID
↳ thread_ts	string	Parent message timestamp (for threaded replies)
↳ parent_user_id	string	User ID of thread parent message author
↳ reply_count	number	Total number of replies in thread
↳ reply_users_count	number	Number of unique users who replied
↳ latest_reply	string	Timestamp of most recent reply
↳ subscribed	boolean	Whether user is subscribed to thread
↳ last_read	string	Timestamp of last read message
↳ unread_count	number	Number of unread messages in thread
↳ subtype	string	Message subtype (bot_message, file_share, etc.)
↳ is_starred	boolean	Whether message is starred by user
↳ pinned_to	array	Channel IDs where message is pinned
↳ permalink	string	Permanent URL to the message
↳ reactions	array	Reactions on this message
↳ name	string	Emoji name (without colons)
↳ count	number	Number of times this reaction was added
↳ users	array	Array of user IDs who reacted
↳ files	array	Files attached to the message
↳ id	string	Unique file identifier
↳ name	string	File name
↳ mimetype	string	MIME type of the file
↳ size	number	File size in bytes
↳ url_private	string	Private download URL (requires auth)
↳ permalink	string	Permanent link to the file
↳ mode	string	File mode (hosted, external, etc.)
↳ attachments	array	Legacy attachments on the message
↳ id	number	Attachment ID
↳ fallback	string	Plain text summary
↳ text	string	Main attachment text
↳ pretext	string	Text shown before attachment
↳ color	string	Color bar hex code or preset
↳ author_name	string	Author display name
↳ author_link	string	Author link URL
↳ author_icon	string	Author icon URL
↳ title	string	Attachment title
↳ title_link	string	Title link URL
↳ image_url	string	Image URL
↳ thumb_url	string	Thumbnail URL
↳ footer	string	Footer text
↳ footer_icon	string	Footer icon URL
↳ ts	string	Timestamp shown in footer
↳ blocks	array	Block Kit blocks in the message
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ edited	object	Edit information if message was edited
↳ user	string	User ID who edited the message
↳ ts	string	Timestamp of the edit
messages	array	All messages (parent + replies) in chronological order
↳ type	string	Message type (usually "message")
↳ ts	string	Message timestamp (unique identifier)
↳ text	string	Message text content
↳ user	string	User ID who sent the message
↳ bot_id	string	Bot ID if sent by a bot
↳ username	string	Display username
↳ channel	string	Channel ID
↳ team	string	Team/workspace ID
↳ thread_ts	string	Parent message timestamp (for threaded replies)
↳ parent_user_id	string	User ID of thread parent message author
↳ reply_count	number	Total number of replies in thread
↳ reply_users_count	number	Number of unique users who replied
↳ latest_reply	string	Timestamp of most recent reply
↳ subscribed	boolean	Whether user is subscribed to thread
↳ last_read	string	Timestamp of last read message
↳ unread_count	number	Number of unread messages in thread
↳ subtype	string	Message subtype (bot_message, file_share, etc.)
↳ is_starred	boolean	Whether message is starred by user
↳ pinned_to	array	Channel IDs where message is pinned
↳ permalink	string	Permanent URL to the message
↳ reactions	array	Reactions on this message
↳ name	string	Emoji name (without colons)
↳ count	number	Number of times this reaction was added
↳ users	array	Array of user IDs who reacted
↳ files	array	Files attached to the message
↳ id	string	Unique file identifier
↳ name	string	File name
↳ mimetype	string	MIME type of the file
↳ size	number	File size in bytes
↳ url_private	string	Private download URL (requires auth)
↳ permalink	string	Permanent link to the file
↳ mode	string	File mode (hosted, external, etc.)
↳ attachments	array	Legacy attachments on the message
↳ id	number	Attachment ID
↳ fallback	string	Plain text summary
↳ text	string	Main attachment text
↳ pretext	string	Text shown before attachment
↳ color	string	Color bar hex code or preset
↳ author_name	string	Author display name
↳ author_link	string	Author link URL
↳ author_icon	string	Author icon URL
↳ title	string	Attachment title
↳ title_link	string	Title link URL
↳ image_url	string	Image URL
↳ thumb_url	string	Thumbnail URL
↳ footer	string	Footer text
↳ footer_icon	string	Footer icon URL
↳ ts	string	Timestamp shown in footer
↳ blocks	array	Block Kit blocks in the message
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ edited	object	Edit information if message was edited
↳ user	string	User ID who edited the message
↳ ts	string	Timestamp of the edit
replyCount	number	Number of replies returned (excluding the parent)
hasMore	boolean	Whether more pages remain beyond the fetched window
nextCursor	string	Cursor to fetch the next page; null when there are no more pages
pages	number	Number of pages fetched in this invocation

Slack Get Channel History

Fetch message history from a Slack channel, automatically following pagination. Optionally filter by a time range to scrape messages since a given timestamp.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Slack channel ID (e.g., C1234567890)
oldest	string	No	Only include messages after this Unix timestamp (seconds, e.g., 1700000000)
latest	string	No	Only include messages before this Unix timestamp (seconds)
inclusive	boolean	No	Include messages with timestamps matching oldest or latest (default: false)
limit	number	No	Messages to request per page (default: 200, max: 999)
cursor	string	No	Pagination cursor from a previous response.nextCursor to resume from
maxPages	number	No	Maximum number of pages to fetch before stopping (default: 10)

Output

Parameter	Type	Description
messages	array	Channel messages in reverse-chronological order (newest first)
↳ type	string	Message type (usually "message")
↳ ts	string	Message timestamp (unique identifier)
↳ text	string	Message text content
↳ user	string	User ID who sent the message
↳ bot_id	string	Bot ID if sent by a bot
↳ username	string	Display username
↳ channel	string	Channel ID
↳ team	string	Team/workspace ID
↳ thread_ts	string	Parent message timestamp (for threaded replies)
↳ parent_user_id	string	User ID of thread parent message author
↳ reply_count	number	Total number of replies in thread
↳ reply_users_count	number	Number of unique users who replied
↳ latest_reply	string	Timestamp of most recent reply
↳ subscribed	boolean	Whether user is subscribed to thread
↳ last_read	string	Timestamp of last read message
↳ unread_count	number	Number of unread messages in thread
↳ subtype	string	Message subtype (bot_message, file_share, etc.)
↳ is_starred	boolean	Whether message is starred by user
↳ pinned_to	array	Channel IDs where message is pinned
↳ permalink	string	Permanent URL to the message
↳ reactions	array	Reactions on this message
↳ name	string	Emoji name (without colons)
↳ count	number	Number of times this reaction was added
↳ users	array	Array of user IDs who reacted
↳ files	array	Files attached to the message
↳ id	string	Unique file identifier
↳ name	string	File name
↳ mimetype	string	MIME type of the file
↳ size	number	File size in bytes
↳ url_private	string	Private download URL (requires auth)
↳ permalink	string	Permanent link to the file
↳ mode	string	File mode (hosted, external, etc.)
↳ attachments	array	Legacy attachments on the message
↳ id	number	Attachment ID
↳ fallback	string	Plain text summary
↳ text	string	Main attachment text
↳ pretext	string	Text shown before attachment
↳ color	string	Color bar hex code or preset
↳ author_name	string	Author display name
↳ author_link	string	Author link URL
↳ author_icon	string	Author icon URL
↳ title	string	Attachment title
↳ title_link	string	Title link URL
↳ image_url	string	Image URL
↳ thumb_url	string	Thumbnail URL
↳ footer	string	Footer text
↳ footer_icon	string	Footer icon URL
↳ ts	string	Timestamp shown in footer
↳ blocks	array	Block Kit blocks in the message
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ edited	object	Edit information if message was edited
↳ user	string	User ID who edited the message
↳ ts	string	Timestamp of the edit
count	number	Total number of messages returned across all fetched pages
hasMore	boolean	Whether more pages remain beyond the fetched window
nextCursor	string	Cursor to fetch the next page; null when there are no more pages
pages	number	Number of pages fetched in this invocation

Slack Get Permalink

Get a stable permalink URL to a specific Slack message.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Channel ID containing the message (e.g., C1234567890)
messageTs	string	Yes	The message's ts value (e.g., 1405894322.002768)

Output

Parameter	Type	Description
ok	boolean	Whether the permalink was retrieved successfully
channel	string	Channel ID containing the message
permalink	string	The permalink URL to the message

Slack Set Assistant Status

Set or clear the assistant thread status indicator (the loading shimmer) on a Slack AI app thread. Pass an empty status to clear it.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Channel ID containing the assistant thread (e.g., C1234567890 or D1234567890)
threadTs	string	Yes	Thread timestamp (thread_ts) of the assistant thread (e.g., 1405894322.002768)
status	string	No	Status text to display, e.g. 'Working on it…'. Omit or pass an empty string to clear the status.
loadingMessages	json	No	Optional list of messages to rotate through as an animated loading indicator (max 10).

Output

Parameter	Type	Description
ok	boolean	Whether the status was set successfully
channel	string	Channel ID the status was set on
threadTs	string	Thread timestamp the status was set on

Slack Set Assistant Title

Set the title of a Slack assistant thread (shown in the AI app thread header).

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Channel ID containing the assistant thread (e.g., C1234567890 or D1234567890)
threadTs	string	Yes	Thread timestamp (thread_ts) of the assistant thread (e.g., 1405894322.002768)
title	string	Yes	The title to display for the assistant thread

Output

Parameter	Type	Description
ok	boolean	Whether the title was set successfully
channel	string	Channel ID the title was set on
threadTs	string	Thread timestamp the title was set on

Slack Set Suggested Prompts

Set the clickable suggested prompts shown in a Slack assistant thread (the prompt chips in an AI app).

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Channel ID containing the assistant thread (e.g., C1234567890 or D1234567890)
threadTs	string	Yes	Thread timestamp (thread_ts) of the assistant thread (e.g., 1405894322.002768)
prompts	json	Yes	Array of prompts, each with a "title" (shown on the chip) and a "message" (sent when clicked). Max 4.
promptsTitle	string	No	Optional heading for the prompt list, e.g. 'Suggested Prompts'

Output

Parameter	Type	Description
ok	boolean	Whether the suggested prompts were set successfully
channel	string	Channel ID the prompts were set on
threadTs	string	Thread timestamp the prompts were set on

Slack Set Agent Suggested Prompts

Set suggested prompts in Slack Agent View, optionally scoped to a specific thread.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Slack authentication method
botToken	string	No	Custom Slack bot token
channel	string	Yes	Agent direct-message channel ID
threadTs	string	No	Optional thread timestamp for legacy thread-scoped prompts
prompts	json	Yes	One to four prompt objects with title and message fields
promptsTitle	string	No	Optional heading displayed above the prompt chips

Output

Parameter	Type	Description
ok	boolean	Whether Slack updated the suggested prompts

Slack Set Agent Session Status

Create or update the state of a Slack agent session associated with a thread.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Slack authentication method
botToken	string	No	Custom Slack bot token
channel	string	Yes	Channel ID containing the agent session thread
threadTs	string	Yes	Timestamp of the thread associated with the agent session
status	string	Yes	Agent session state: active, processing, suspended, or closed
title	string	No	Title used when creating the agent session, up to 200 characters
initiatorUserId	string	No	Slack user ID that initiated the session
iconEmoji	string	No	Emoji used to customize the agent identity
iconUrl	string	No	Image URL used to customize the agent identity
username	string	No	Display name used to customize the agent identity

Output

Parameter	Type	Description
ok	boolean	Whether Slack updated the agent session
status	string	Requested agent session status
agentStatus	string	Agent status recorded by Slack
title	string	Current agent session title, or null when the session has no title

Slack Rename Agent Session

Rename the Slack agent session associated with a thread.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Slack authentication method
botToken	string	No	Custom Slack bot token
channel	string	Yes	Channel ID containing the agent session thread
threadTs	string	Yes	Timestamp of the thread associated with the agent session
title	string	Yes	New agent session title, from 1 to 200 characters

Output

Parameter	Type	Description
ok	boolean	Whether Slack renamed the agent session
title	string	Updated agent session title

Slack List Channels

List one page of accessible public and private Slack channels. Pass the returned nextCursor as cursor to fetch the next page.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
includePrivate	boolean	No	Include private channels the connected account can access (default: true)
excludeArchived	boolean	No	Exclude archived channels (default: true)
limit	number	No	Conversations to request per Slack page (default: 100, max: 200)
cursor	string	No	Pagination cursor from a previous response.nextCursor to resume from

Output

Parameter	Type	Description
channels	array	One page of accessible public and private channels
↳ id	string	Conversation ID (for example, C123, D123, or G123)
↳ name	string	Channel or group-DM name; omitted for one-to-one direct messages
↳ is_channel	boolean	Whether this is a channel
↳ is_private	boolean	Whether the conversation is private
↳ is_archived	boolean	Whether the conversation is archived
↳ is_general	boolean	Whether this is the general channel
↳ is_member	boolean	Whether the credential owner is a member
↳ is_shared	boolean	Whether channel is shared across workspaces
↳ is_ext_shared	boolean	Whether channel is externally shared
↳ is_org_shared	boolean	Whether channel is org-wide shared
↳ num_members	number	Number of members in the channel
↳ topic	string	Conversation topic
↳ purpose	string	Conversation purpose
↳ created	number	Unix timestamp when channel was created
↳ creator	string	User ID of channel creator
↳ updated	number	Unix timestamp of last update
↳ is_group	boolean	Whether this is a legacy private channel or group direct message
↳ is_im	boolean	Whether this is a one-to-one direct message
↳ is_mpim	boolean	Whether this is a group direct message
↳ user	string	Other participant user ID for a one-to-one direct message
↳ is_user_deleted	boolean	Whether the other participant in a direct message is deactivated
↳ is_open	boolean	Whether a direct or group-direct-message conversation is open
↳ priority	number	Slack sidebar sort priority
ids	array	Conversation IDs for every returned channel
names	array	Names of returned channels
count	number	Number of conversations returned in this page
hasMore	boolean	Whether a next cursor is available to fetch more Slack conversations
nextCursor	string	Cursor to fetch the next page; null when there are no more pages

Slack List Channel Members

List all members (user IDs) in a Slack channel. Use with Get User Info to resolve IDs to names.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Channel ID to list members from
limit	number	No	Maximum number of members to return (default: 100, max: 200)
cursor	string	No	Pagination cursor from a previous response.next_cursor

Output

Parameter	Type	Description
members	array	Array of user IDs who are members of the channel (e.g., U1234567890)
count	number	Total number of members returned
nextCursor	string	Cursor for the next page; null if no more pages

Slack List Users

List all users in a Slack workspace. Returns user profiles with names and avatars.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
includeDeleted	boolean	No	Include deactivated/deleted users (default: false)
limit	number	No	Maximum number of users to return (default: 100, max: 200)
cursor	string	No	Pagination cursor from a previous response.next_cursor

Output

Parameter	Type	Description
users	array	Array of user objects from the workspace
↳ id	string	User ID (e.g., U1234567890)
↳ name	string	Username (handle)
↳ real_name	string	Full real name
↳ display_name	string	Display name shown in Slack
↳ email	string	Email address (requires users:read.email scope)
↳ is_bot	boolean	Whether the user is a bot
↳ is_admin	boolean	Whether the user is a workspace admin
↳ is_owner	boolean	Whether the user is the workspace owner
↳ deleted	boolean	Whether the user is deactivated
↳ timezone	string	User timezone identifier
↳ avatar	string	URL to user avatar image
↳ status_text	string	Custom status text
↳ status_emoji	string	Custom status emoji
ids	array	Array of user IDs for easy access
names	array	Array of usernames for easy access
count	number	Total number of users returned
nextCursor	string	Cursor for the next page; null if no more pages

Slack Get User Info

Get detailed information about a specific Slack user by their user ID.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
userId	string	Yes	User ID to look up (e.g., U1234567890)

Output

Parameter	Type	Description
user	object	Detailed user information
↳ id	string	User ID (e.g., U1234567890)
↳ team_id	string	Workspace/team ID
↳ name	string	Username (handle)
↳ real_name	string	Full real name
↳ display_name	string	Display name shown in Slack
↳ first_name	string	First name
↳ last_name	string	Last name
↳ title	string	Job title
↳ phone	string	Phone number
↳ skype	string	Skype handle
↳ email	string	Email address (requires users:read.email scope)
↳ is_bot	boolean	Whether the user is a bot
↳ is_admin	boolean	Whether the user is a workspace admin
↳ is_owner	boolean	Whether the user is the workspace owner
↳ is_primary_owner	boolean	Whether the user is the primary owner
↳ is_restricted	boolean	Whether the user is a guest (restricted)
↳ is_ultra_restricted	boolean	Whether the user is a single-channel guest
↳ is_app_user	boolean	Whether user is an app user
↳ deleted	boolean	Whether the user is deactivated
↳ color	string	User color for display
↳ timezone	string	Timezone identifier (e.g., America/Los_Angeles)
↳ timezone_label	string	Human-readable timezone label
↳ timezone_offset	number	Timezone offset in seconds from UTC
↳ avatar	string	URL to user avatar image
↳ avatar_24	string	URL to 24px avatar
↳ avatar_48	string	URL to 48px avatar
↳ avatar_72	string	URL to 72px avatar
↳ avatar_192	string	URL to 192px avatar
↳ avatar_512	string	URL to 512px avatar
↳ status_text	string	Custom status text
↳ status_emoji	string	Custom status emoji
↳ status_expiration	number	Unix timestamp when status expires
↳ updated	number	Unix timestamp of last profile update
↳ has_2fa	boolean	Whether two-factor auth is enabled

Download File from Slack

Download a file from Slack

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
fileId	string	Yes	The ID of the file to download
fileName	string	No	Optional filename override

Output

Parameter	Type	Description
file	file	Downloaded file stored in execution files

Slack Update Message

Update a message previously sent by the bot in Slack

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Channel ID where the message was posted (e.g., C1234567890)
timestamp	string	Yes	Timestamp of the message to update (e.g., 1405894322.002768)
text	string	Yes	New message text (supports Slack mrkdwn formatting)
blocks	json	No	Block Kit layout blocks as a JSON array. When provided, text becomes the fallback notification text.

Output

Parameter	Type	Description
message	object	Complete updated message object with all properties returned by Slack
↳ type	string	Message type (usually "message")
↳ ts	string	Message timestamp (unique identifier)
↳ text	string	Message text content
↳ user	string	User ID who sent the message
↳ bot_id	string	Bot ID if sent by a bot
↳ username	string	Display username
↳ channel	string	Channel ID
↳ team	string	Team/workspace ID
↳ thread_ts	string	Parent message timestamp (for threaded replies)
↳ parent_user_id	string	User ID of thread parent message author
↳ reply_count	number	Total number of replies in thread
↳ reply_users_count	number	Number of unique users who replied
↳ latest_reply	string	Timestamp of most recent reply
↳ subscribed	boolean	Whether user is subscribed to thread
↳ last_read	string	Timestamp of last read message
↳ unread_count	number	Number of unread messages in thread
↳ subtype	string	Message subtype (bot_message, file_share, etc.)
↳ is_starred	boolean	Whether message is starred by user
↳ pinned_to	array	Channel IDs where message is pinned
↳ permalink	string	Permanent URL to the message
↳ reactions	array	Reactions on this message
↳ name	string	Emoji name (without colons)
↳ count	number	Number of times this reaction was added
↳ users	array	Array of user IDs who reacted
↳ files	array	Files attached to the message
↳ id	string	Unique file identifier
↳ name	string	File name
↳ mimetype	string	MIME type of the file
↳ size	number	File size in bytes
↳ url_private	string	Private download URL (requires auth)
↳ permalink	string	Permanent link to the file
↳ mode	string	File mode (hosted, external, etc.)
↳ attachments	array	Legacy attachments on the message
↳ id	number	Attachment ID
↳ fallback	string	Plain text summary
↳ text	string	Main attachment text
↳ pretext	string	Text shown before attachment
↳ color	string	Color bar hex code or preset
↳ author_name	string	Author display name
↳ author_link	string	Author link URL
↳ author_icon	string	Author icon URL
↳ title	string	Attachment title
↳ title_link	string	Title link URL
↳ image_url	string	Image URL
↳ thumb_url	string	Thumbnail URL
↳ footer	string	Footer text
↳ footer_icon	string	Footer icon URL
↳ ts	string	Timestamp shown in footer
↳ blocks	array	Block Kit blocks in the message
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ edited	object	Edit information if message was edited
↳ user	string	User ID who edited the message
↳ ts	string	Timestamp of the edit
content	string	Success message
metadata	object	Updated message metadata
↳ channel	string	Channel ID
↳ timestamp	string	Message timestamp
↳ text	string	Updated message text

Slack Delete Message

Delete a message previously sent by the bot in Slack

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Channel ID where the message was posted (e.g., C1234567890)
timestamp	string	Yes	Timestamp of the message to delete (e.g., 1405894322.002768)

Output

Parameter	Type	Description
content	string	Success message
metadata	object	Deleted message metadata
↳ channel	string	Channel ID
↳ timestamp	string	Message timestamp

Slack Add Reaction

Add an emoji reaction to a Slack message

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Channel ID where the message was posted (e.g., C1234567890)
timestamp	string	Yes	Timestamp of the message to react to (e.g., 1405894322.002768)
name	string	Yes	Name of the emoji reaction (without colons, e.g., thumbsup, heart, eyes)

Output

Parameter	Type	Description
content	string	Success message
metadata	object	Reaction metadata
↳ channel	string	Channel ID
↳ timestamp	string	Message timestamp
↳ reaction	string	Emoji reaction name

Slack Remove Reaction

Remove an emoji reaction from a Slack message

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Channel ID where the message was posted (e.g., C1234567890)
timestamp	string	Yes	Timestamp of the message to remove reaction from (e.g., 1405894322.002768)
name	string	Yes	Name of the emoji reaction to remove (without colons, e.g., thumbsup, heart, eyes)

Output

Parameter	Type	Description
content	string	Success message
metadata	object	Reaction metadata
↳ channel	string	Channel ID
↳ timestamp	string	Message timestamp
↳ reaction	string	Emoji reaction name

Slack Get Channel Info

Get detailed information about a Slack channel by its ID

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Channel ID to get information about (e.g., C1234567890)
includeNumMembers	boolean	No	Whether to include the member count in the response

Output

Parameter	Type	Description
channelInfo	object	Detailed channel information
↳ id	string	Channel ID (e.g., C1234567890)
↳ name	string	Channel name without # prefix
↳ is_channel	boolean	Whether this is a channel
↳ is_private	boolean	Whether channel is private
↳ is_archived	boolean	Whether channel is archived
↳ is_general	boolean	Whether this is the general channel
↳ is_member	boolean	Whether the bot/user is a member
↳ is_shared	boolean	Whether channel is shared across workspaces
↳ is_ext_shared	boolean	Whether channel is externally shared
↳ is_org_shared	boolean	Whether channel is org-wide shared
↳ num_members	number	Number of members in the channel
↳ topic	string	Channel topic
↳ purpose	string	Channel purpose/description
↳ created	number	Unix timestamp when channel was created
↳ creator	string	User ID of channel creator
↳ updated	number	Unix timestamp of last update

Slack Get User Presence

Check whether a Slack user is currently active or away

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
userId	string	Yes	User ID to check presence for (e.g., U1234567890)

Output

Parameter	Type	Description
presence	string	User presence status: "active" or "away"
online	boolean	Whether user has an active client connection (only available when checking own presence)
autoAway	boolean	Whether user was automatically set to away due to inactivity (only available when checking own presence)
manualAway	boolean	Whether user manually set themselves as away (only available when checking own presence)
connectionCount	number	Total number of active connections for the user (only available when checking own presence)
lastActivity	number	Unix timestamp of last detected activity (only available when checking own presence)

Slack Edit Canvas

Edit an existing Slack canvas by inserting, replacing, or deleting content

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
canvasId	string	Yes	Canvas ID to edit (e.g., F1234ABCD)
operation	string	Yes	Edit operation: insert_at_start, insert_at_end, insert_after, insert_before, replace, delete, or rename
content	string	No	Markdown content for the operation (required for insert/replace operations)
sectionId	string	No	Section ID to target (required for insert_after, insert_before, and delete; omit for replace to replace the whole canvas)
title	string	No	New title for the canvas (only used with rename operation)

Output

Parameter	Type	Description
content	string	Success message

Slack Create Channel Canvas

Create a canvas pinned to a Slack channel as its resource hub

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Channel ID to create the canvas in (e.g., C1234567890)
title	string	No	Title for the channel canvas
content	string	No	Canvas content in markdown format

Output

Parameter	Type	Description
canvas_id	string	ID of the created channel canvas

Slack Get Canvas Info

Get Slack canvas file metadata by canvas ID

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
canvasId	string	Yes	Canvas file ID to retrieve (e.g., F1234ABCD)

Output

Parameter	Type	Description
canvas	object	Canvas file information returned by Slack
↳ id	string	Unique canvas file identifier
↳ created	number	Unix timestamp when the canvas was created
↳ timestamp	number	Unix timestamp associated with the canvas
↳ name	string	Canvas file name
↳ title	string	Canvas title
↳ mimetype	string	MIME type of the canvas file
↳ filetype	string	Slack file type for the canvas
↳ pretty_type	string	Human-readable file type
↳ user	string	User ID of the canvas creator
↳ editable	boolean	Whether the canvas file is editable
↳ size	number	Canvas file size in bytes
↳ mode	string	File mode
↳ is_external	boolean	Whether the canvas is externally hosted
↳ is_public	boolean	Whether the canvas is public
↳ url_private	string	Private URL for the canvas file
↳ url_private_download	string	Private download URL for the canvas file
↳ permalink	string	Permanent URL for the canvas
↳ channels	array	Public channel IDs where the canvas appears
↳ groups	array	Private channel IDs where the canvas appears
↳ ims	array	Direct message IDs where the canvas appears
↳ canvas_readtime	number	Approximate read time for canvas content
↳ is_channel_space	boolean	Whether this canvas is linked to a channel
↳ linked_channel_id	string	Channel ID linked to this canvas
↳ canvas_creator_id	string	User ID of the canvas creator

Slack List Canvases

List Slack canvases available to the authenticated user or bot

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	No	Filter canvases appearing in a specific channel ID
count	number	No	Number of canvases to return per page
page	number	No	Page number to return
user	string	No	Filter canvases created by a single user ID
tsFrom	string	No	Filter canvases created after this Unix timestamp
tsTo	string	No	Filter canvases created before this Unix timestamp
teamId	string	No	Encoded team ID, required when using an org-level token

Output

Parameter	Type	Description
canvases	array	Canvas file objects returned by Slack
↳ id	string	Unique canvas file identifier
↳ created	number	Unix timestamp when the canvas was created
↳ timestamp	number	Unix timestamp associated with the canvas
↳ name	string	Canvas file name
↳ title	string	Canvas title
↳ mimetype	string	MIME type of the canvas file
↳ filetype	string	Slack file type for the canvas
↳ pretty_type	string	Human-readable file type
↳ user	string	User ID of the canvas creator
↳ editable	boolean	Whether the canvas file is editable
↳ size	number	Canvas file size in bytes
↳ mode	string	File mode
↳ is_external	boolean	Whether the canvas is externally hosted
↳ is_public	boolean	Whether the canvas is public
↳ url_private	string	Private URL for the canvas file
↳ url_private_download	string	Private download URL for the canvas file
↳ permalink	string	Permanent URL for the canvas
↳ channels	array	Public channel IDs where the canvas appears
↳ groups	array	Private channel IDs where the canvas appears
↳ ims	array	Direct message IDs where the canvas appears
↳ canvas_readtime	number	Approximate read time for canvas content
↳ is_channel_space	boolean	Whether this canvas is linked to a channel
↳ linked_channel_id	string	Channel ID linked to this canvas
↳ canvas_creator_id	string	User ID of the canvas creator
paging	object	Pagination information from Slack
↳ count	number	Number of items requested per page
↳ total	number	Total number of matching files
↳ page	number	Current page number
↳ pages	number	Total number of pages

Slack Lookup Canvas Sections

Find Slack canvas section IDs matching criteria for later edits

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
canvasId	string	Yes	Canvas ID to search (e.g., F1234ABCD)
criteria	json	Yes	Section lookup criteria, such as {"section_types":["h1"],"contains_text":"Roadmap"}

Output

Parameter	Type	Description
sections	array	Canvas sections matching the lookup criteria
↳ id	string	Canvas section identifier

Slack Delete Canvas

Delete a Slack canvas by its canvas ID

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
canvasId	string	Yes	Canvas ID to delete (e.g., F1234ABCD)

Output

Parameter	Type	Description
ok	boolean	Whether Slack deleted the canvas successfully

Slack Lists Create List

Create a Slack List with an optional column schema. Requires a paid Slack plan.

Inputs and outputs

Input

Parameter	Type	Required	Description
name	string	Yes	Name of the new List
schema	json	No	Column definitions with key, name, type, and optional is_primary_column/options. Read returned column IDs before writing rows.
description	string	No	Plain text description, encoded as Slack rich text
todoMode	boolean	No	Add task tracking fields for completion, assignee, and due date

Output

Parameter	Type	Description
listId	string	Created Slack List ID
schema	array	Column schema with IDs; null if Slack omitted it
↳ id	string	Column ID
↳ key	string	Column key
↳ name	string	Column name
↳ type	string	Slack column type
↳ is_primary_column	boolean	Whether this is the primary text column
↳ options	json	Type-specific column settings, including select choices (value, label, color)

Slack Lists Update List

Update a Slack List name, description, or task tracking fields.

Inputs and outputs

Input

Parameter	Type	Required	Description
listId	string	Yes	Slack List ID, from the List URL or Create List output
name	string	No	New name for the List
description	string	No	Plain text description, encoded as Slack rich text
todoMode	boolean	No	Enable or disable task tracking fields; omit to leave unchanged

Output

Parameter	Type	Description
ok	boolean	Whether Slack completed the operation

Slack Lists Share List

Grant users or channels access to a Slack List. Provide exactly one of userIds or channelIds. Read allows viewing, write allows editing, and owner grants ownership to users only; only a current owner can grant ownership.

Inputs and outputs

Input

Parameter	Type	Required	Description
listId	string	Yes	Slack List ID, from the List URL or Create List output
accessLevel	string	Yes	Access to grant: read, write, or owner. Ownership can only be granted to users.
userIds	json	No	Nonempty JSON array of Slack user IDs, e.g. ["U0123456789"]. Omit channelIds.
channelIds	json	No	Nonempty JSON array of Slack channel IDs, e.g. ["C0123456789"]. Omit userIds. Supports read or write access.

Output

Parameter	Type	Description
ok	boolean	Whether Slack completed the operation

Slack Lists List Items

Read a page of Slack List rows and optionally its column schema. Pass nextCursor as cursor to continue; an empty nextCursor ends pagination.

Inputs and outputs

Input

Parameter	Type	Required	Description
listId	string	Yes	Slack List ID, from the List URL or Create List output
limit	number	No	Maximum rows in this page (positive integer; defaults to 100)
cursor	string	No	Continuation cursor from the previous response
archived	boolean	No	Return archived rows instead of active rows
includeList	boolean	No	Include List title and schema (defaults to true); schema IDs are required to write cells

Output

Parameter	Type	Description
items	array	Rows in this page
↳ id	string	Row ID; use as row_id for cell updates
↳ list_id	string	Parent List ID
↳ date_created	number	Creation Unix timestamp
↳ fields	array	Cells with column_id, key, value and type-specific values
↳ column_id	string	Column ID
↳ key	string	Column key
↳ value	json	Legacy scalar value; use typed values for writes
↳ text	string	Display text; not accepted for writes
↳ rich_text	json	Slack Block Kit rich text
↳ number	array	Numeric values
↳ select	array	Select choice values
↳ date	array	Dates in YYYY-MM-DD format
↳ user	array	Slack user IDs
↳ channel	array	Slack channel IDs
↳ attachment	array	Slack file IDs
↳ checkbox	json	Checkbox boolean or boolean array returned by Slack; write a scalar boolean
↳ email	array	Email values
↳ phone	array	Phone values
↳ rating	array	Rating values
↳ timestamp	array	Unix timestamps
↳ message	json	Message references with value, channel_id, ts, and optional thread_ts
↳ link	json	Link values with originalUrl and optional displayAsUrl/displayName/attachment
↳ reference	json	Typed references to messages, List rows, files, or canvas sections
↳ created_by	string	Creator user ID
↳ updated_by	string	Last editor user ID
↳ updated_timestamp	string	Last update timestamp
↳ parent_record_id	string	Parent row ID for subtasks
list	object	Parent List (id, title, schema); null if not included
↳ id	string	List ID
↳ title	string	List title
↳ schema	array	Column schema: use id as column_id when writing cells
↳ id	string	Column ID
↳ key	string	Column key
↳ name	string	Column name
↳ type	string	Slack column type
↳ is_primary_column	boolean	Whether this is the primary text column
↳ options	json	Type-specific column settings, including select choices (value, label, color)
nextCursor	string	Next page cursor; empty when there are no more rows

Slack Lists Get Item

Read a Slack List row and its parent List column schema.

Inputs and outputs

Input

Parameter	Type	Required	Description
listId	string	Yes	Slack List ID
itemId	string	Yes	Row ID returned by List Items or Create Item

Output

Parameter	Type	Description
item	object	Slack List row
↳ id	string	Row ID; use as row_id for cell updates
↳ list_id	string	Parent List ID
↳ date_created	number	Creation Unix timestamp
↳ fields	array	Cells with column_id, key, value and type-specific values
↳ column_id	string	Column ID
↳ key	string	Column key
↳ value	json	Legacy scalar value; use typed values for writes
↳ text	string	Display text; not accepted for writes
↳ rich_text	json	Slack Block Kit rich text
↳ number	array	Numeric values
↳ select	array	Select choice values
↳ date	array	Dates in YYYY-MM-DD format
↳ user	array	Slack user IDs
↳ channel	array	Slack channel IDs
↳ attachment	array	Slack file IDs
↳ checkbox	json	Checkbox boolean or boolean array returned by Slack; write a scalar boolean
↳ email	array	Email values
↳ phone	array	Phone values
↳ rating	array	Rating values
↳ timestamp	array	Unix timestamps
↳ message	json	Message references with value, channel_id, ts, and optional thread_ts
↳ link	json	Link values with originalUrl and optional displayAsUrl/displayName/attachment
↳ reference	json	Typed references to messages, List rows, files, or canvas sections
↳ created_by	string	Creator user ID
↳ updated_by	string	Last editor user ID
↳ updated_timestamp	string	Last update timestamp
↳ parent_record_id	string	Parent row ID for subtasks
list	object	Parent List title and column schema
↳ id	string	List ID
↳ title	string	List title
↳ schema	array	Column schema: use id as column_id when writing cells
↳ id	string	Column ID
↳ key	string	Column key
↳ name	string	Column name
↳ type	string	Slack column type
↳ is_primary_column	boolean	Whether this is the primary text column
↳ options	json	Type-specific column settings, including select choices (value, label, color)

Slack Lists Create Item

Create a Slack List row using real column IDs and typed cell values. Text columns require rich_text, not text.

Inputs and outputs

Input

Parameter	Type	Required	Description
listId	string	Yes	Slack List ID
initialFields	json	No	Array of typed fields, each with column_id and exactly one value such as rich_text, number, select, date, user, or checkbox. Use schema IDs from List Items (includeList=true).
parentItemId	string	No	Parent row ID when creating a subtask
duplicatedItemId	string	No	Existing row ID to duplicate

Output

Parameter	Type	Description
item	object	Slack List row
↳ id	string	Row ID; use as row_id for cell updates
↳ list_id	string	Parent List ID
↳ date_created	number	Creation Unix timestamp
↳ fields	array	Cells with column_id, key, value and type-specific values
↳ column_id	string	Column ID
↳ key	string	Column key
↳ value	json	Legacy scalar value; use typed values for writes
↳ text	string	Display text; not accepted for writes
↳ rich_text	json	Slack Block Kit rich text
↳ number	array	Numeric values
↳ select	array	Select choice values
↳ date	array	Dates in YYYY-MM-DD format
↳ user	array	Slack user IDs
↳ channel	array	Slack channel IDs
↳ attachment	array	Slack file IDs
↳ checkbox	json	Checkbox boolean or boolean array returned by Slack; write a scalar boolean
↳ email	array	Email values
↳ phone	array	Phone values
↳ rating	array	Rating values
↳ timestamp	array	Unix timestamps
↳ message	json	Message references with value, channel_id, ts, and optional thread_ts
↳ link	json	Link values with originalUrl and optional displayAsUrl/displayName/attachment
↳ reference	json	Typed references to messages, List rows, files, or canvas sections
↳ created_by	string	Creator user ID
↳ updated_by	string	Last editor user ID
↳ updated_timestamp	string	Last update timestamp
↳ parent_record_id	string	Parent row ID for subtasks

Slack Lists Update Items

Update cells across Slack List rows. Each cell requires row_id, column_id, and one typed value. Use empty arrays to clear array-valued cells, or false to clear a checkbox.

Inputs and outputs

Input

Parameter	Type	Required	Description
listId	string	Yes	Slack List ID
cells	json	Yes	Nonempty array of cells with row_id, column_id and a typed value (e.g. {"row_id":"Rec...","column_id":"Col...","checkbox":true}). Text uses rich_text blocks.

Output

Parameter	Type	Description
ok	boolean	Whether Slack completed the operation

Slack Lists Delete Item

Delete a row from an existing Slack List.

Inputs and outputs

Input

Parameter	Type	Required	Description
listId	string	Yes	Slack List ID
itemId	string	Yes	Row ID to delete

Output

Parameter	Type	Description
ok	boolean	Whether Slack completed the operation

Slack Create Conversation

Create a new public or private channel in a Slack workspace.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
name	string	Yes	Name of the channel to create (lowercase, numbers, hyphens, underscores only; max 80 characters)
isPrivate	boolean	No	Create a private channel instead of a public one (default: false)
teamId	string	No	Encoded team ID to create the channel in (required if using an org token)

Output

Parameter	Type	Description
channelInfo	object	The newly created channel object
↳ id	string	Channel ID (e.g., C1234567890)
↳ name	string	Channel name without # prefix
↳ is_channel	boolean	Whether this is a channel
↳ is_private	boolean	Whether channel is private
↳ is_archived	boolean	Whether channel is archived
↳ is_general	boolean	Whether this is the general channel
↳ is_member	boolean	Whether the bot/user is a member
↳ is_shared	boolean	Whether channel is shared across workspaces
↳ is_ext_shared	boolean	Whether channel is externally shared
↳ is_org_shared	boolean	Whether channel is org-wide shared
↳ num_members	number	Number of members in the channel
↳ topic	string	Channel topic
↳ purpose	string	Channel purpose/description
↳ created	number	Unix timestamp when channel was created
↳ creator	string	User ID of channel creator
↳ updated	number	Unix timestamp of last update

Slack Invite to Conversation

Invite one or more users to a Slack channel. Supports up to 100 users at a time.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	The ID of the channel to invite users to
users	string	Yes	Comma-separated list of user IDs to invite (up to 100)
force	boolean	No	When true, continues inviting valid users while skipping invalid ones (default: false)

Output

Parameter	Type	Description
channelInfo	object	The channel object after inviting users
↳ id	string	Channel ID (e.g., C1234567890)
↳ name	string	Channel name without # prefix
↳ is_channel	boolean	Whether this is a channel
↳ is_private	boolean	Whether channel is private
↳ is_archived	boolean	Whether channel is archived
↳ is_general	boolean	Whether this is the general channel
↳ is_member	boolean	Whether the bot/user is a member
↳ is_shared	boolean	Whether channel is shared across workspaces
↳ is_ext_shared	boolean	Whether channel is externally shared
↳ is_org_shared	boolean	Whether channel is org-wide shared
↳ num_members	number	Number of members in the channel
↳ topic	string	Channel topic
↳ purpose	string	Channel purpose/description
↳ created	number	Unix timestamp when channel was created
↳ creator	string	User ID of channel creator
↳ updated	number	Unix timestamp of last update
errors	array	Per-user errors when force is true and some invitations failed
↳ user	string	User ID that failed
↳ ok	boolean	Always false for error entries
↳ error	string	Error code for this user

Slack Open View

Open a modal view in Slack using a trigger_id from an interaction payload. Used to display forms, confirmations, and other interactive modals.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
triggerId	string	Yes	Exchange a trigger to post to the user. Obtained from an interaction payload (e.g., slash command, button click)
interactivityPointer	string	No	Alternative to trigger_id for posting to user
view	json	Yes	A view payload object defining the modal. Must include type ("modal"), title, and blocks array

Output

Parameter	Type	Description
view	object	The opened modal view object
↳ id	string	Unique view identifier
↳ team_id	string	Workspace/team ID
↳ type	string	View type (e.g., "modal")
↳ title	json	Plain text title object with type and text fields
↳ type	string	Text object type (plain_text)
↳ text	string	Title text content
↳ submit	json	Plain text submit button object
↳ type	string	Text object type (plain_text)
↳ text	string	Submit button text
↳ close	json	Plain text close button object
↳ type	string	Text object type (plain_text)
↳ text	string	Close button text
↳ blocks	array	Block Kit blocks in the view
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ private_metadata	string	Private metadata string passed with the view
↳ callback_id	string	Custom identifier for the view
↳ external_id	string	Custom external identifier (max 255 chars, unique per workspace)
↳ state	json	Current state of the view with input values
↳ hash	string	View version hash for updates
↳ clear_on_close	boolean	Whether to clear all views in the stack when this view is closed
↳ notify_on_close	boolean	Whether to send a view_closed event when this view is closed
↳ root_view_id	string	ID of the root view in the view stack
↳ previous_view_id	string	ID of the previous view in the view stack
↳ app_id	string	Application identifier
↳ bot_id	string	Bot identifier

Slack Update View

Update an existing modal view in Slack. Identify the view by view_id or external_id, and provide the updated view payload.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
viewId	string	No	Unique identifier of the view to update. Either viewId or externalId is required
externalId	string	No	Developer-set unique identifier of the view to update (max 255 chars). Either viewId or externalId is required
hash	string	No	View state hash to protect against race conditions. Obtained from a previous views response
view	json	Yes	A view payload object defining the updated modal. Must include type ("modal"), title, and blocks array. Use identical block_id and action_id values to preserve input data

Output

Parameter	Type	Description
view	object	The updated modal view object
↳ id	string	Unique view identifier
↳ team_id	string	Workspace/team ID
↳ type	string	View type (e.g., "modal")
↳ title	json	Plain text title object with type and text fields
↳ type	string	Text object type (plain_text)
↳ text	string	Title text content
↳ submit	json	Plain text submit button object
↳ type	string	Text object type (plain_text)
↳ text	string	Submit button text
↳ close	json	Plain text close button object
↳ type	string	Text object type (plain_text)
↳ text	string	Close button text
↳ blocks	array	Block Kit blocks in the view
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ private_metadata	string	Private metadata string passed with the view
↳ callback_id	string	Custom identifier for the view
↳ external_id	string	Custom external identifier (max 255 chars, unique per workspace)
↳ state	json	Current state of the view with input values
↳ hash	string	View version hash for updates
↳ clear_on_close	boolean	Whether to clear all views in the stack when this view is closed
↳ notify_on_close	boolean	Whether to send a view_closed event when this view is closed
↳ root_view_id	string	ID of the root view in the view stack
↳ previous_view_id	string	ID of the previous view in the view stack
↳ app_id	string	Application identifier
↳ bot_id	string	Bot identifier

Slack Push View

Push a new view onto an existing modal stack in Slack. Limited to 2 additional views after the initial modal is opened.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
triggerId	string	Yes	Exchange a trigger to post to the user. Obtained from an interaction payload (e.g., button click within an existing modal)
interactivityPointer	string	No	Alternative to trigger_id for posting to user
view	json	Yes	A view payload object defining the modal to push. Must include type ("modal"), title, and blocks array

Output

Parameter	Type	Description
view	object	The pushed modal view object
↳ id	string	Unique view identifier
↳ team_id	string	Workspace/team ID
↳ type	string	View type (e.g., "modal")
↳ title	json	Plain text title object with type and text fields
↳ type	string	Text object type (plain_text)
↳ text	string	Title text content
↳ submit	json	Plain text submit button object
↳ type	string	Text object type (plain_text)
↳ text	string	Submit button text
↳ close	json	Plain text close button object
↳ type	string	Text object type (plain_text)
↳ text	string	Close button text
↳ blocks	array	Block Kit blocks in the view
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ private_metadata	string	Private metadata string passed with the view
↳ callback_id	string	Custom identifier for the view
↳ external_id	string	Custom external identifier (max 255 chars, unique per workspace)
↳ state	json	Current state of the view with input values
↳ hash	string	View version hash for updates
↳ clear_on_close	boolean	Whether to clear all views in the stack when this view is closed
↳ notify_on_close	boolean	Whether to send a view_closed event when this view is closed
↳ root_view_id	string	ID of the root view in the view stack
↳ previous_view_id	string	ID of the previous view in the view stack
↳ app_id	string	Application identifier
↳ bot_id	string	Bot identifier

Slack Publish View

Publish a static view to a user's Home tab in Slack. Used to create or update the app's Home tab experience.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
userId	string	Yes	The user ID to publish the Home tab view to (e.g., U0BPQUNTA)
hash	string	No	View state hash to protect against race conditions. Obtained from a previous views response
view	json	Yes	A view payload object defining the Home tab. Must include type ("home") and blocks array

Output

Parameter	Type	Description
view	object	The published Home tab view object
↳ id	string	Unique view identifier
↳ team_id	string	Workspace/team ID
↳ type	string	View type (e.g., "modal")
↳ title	json	Plain text title object with type and text fields
↳ type	string	Text object type (plain_text)
↳ text	string	Title text content
↳ submit	json	Plain text submit button object
↳ type	string	Text object type (plain_text)
↳ text	string	Submit button text
↳ close	json	Plain text close button object
↳ type	string	Text object type (plain_text)
↳ text	string	Close button text
↳ blocks	array	Block Kit blocks in the view
↳ type	string	Block type (section, divider, image, actions, etc.)
↳ block_id	string	Unique block identifier
↳ private_metadata	string	Private metadata string passed with the view
↳ callback_id	string	Custom identifier for the view
↳ external_id	string	Custom external identifier (max 255 chars, unique per workspace)
↳ state	json	Current state of the view with input values
↳ hash	string	View version hash for updates
↳ clear_on_close	boolean	Whether to clear all views in the stack when this view is closed
↳ notify_on_close	boolean	Whether to send a view_closed event when this view is closed
↳ root_view_id	string	ID of the root view in the view stack
↳ previous_view_id	string	ID of the previous view in the view stack
↳ app_id	string	Application identifier
↳ bot_id	string	Bot identifier

Slack Schedule Message

Schedule a message to be sent to a Slack channel or DM at a future time.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Channel, private group, or DM to receive the message (e.g., C1234567890)
postAt	number	Yes	Unix timestamp (seconds) representing the future time the message should post
text	string	No	Message text to send (supports Slack mrkdwn formatting)
blocks	json	No	Block Kit layout blocks as a JSON array. When provided, text becomes the fallback notification text.
threadTs	string	No	Thread timestamp to reply to (creates a scheduled thread reply)

Output

Parameter	Type	Description
scheduledMessageId	string	Identifier of the scheduled message (used to delete it before it posts)
postAt	number	Unix timestamp when the message will post
channel	string	Channel ID where the message is scheduled
message	object	The scheduled message object returned by Slack

Slack List Scheduled Messages

List pending scheduled messages in a Slack workspace, optionally filtered by channel.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	No	Optional channel ID to filter scheduled messages (e.g., C1234567890)
limit	number	No	Maximum number of scheduled messages to return
cursor	string	No	Pagination cursor (next_cursor) from a previous response
oldest	string	No	Unix timestamp of the oldest scheduled message to include
latest	string	No	Unix timestamp of the latest scheduled message to include
teamId	string	No	Encoded team ID (required only with org-level tokens)

Output

Parameter	Type	Description
scheduledMessages	array	Array of pending scheduled message objects
↳ id	string	Scheduled message ID
↳ channel_id	string	Channel the message is scheduled for
↳ post_at	number	Unix timestamp when the message will post
↳ date_created	number	Unix timestamp when the schedule was created
↳ text	string	Scheduled message text
nextCursor	string	Cursor for the next page (null when there are no more pages)

Slack Delete Scheduled Message

Delete a pending scheduled message before it posts to Slack.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	Channel ID where the scheduled message is queued (e.g., C1234567890)
scheduledMessageId	string	Yes	Scheduled message ID from chat.scheduleMessage (e.g., Q1234ABCD)

Output

Parameter	Type	Description
ok	boolean	Whether the scheduled message was deleted successfully

Slack Archive Conversation

Archive a Slack channel so it is closed to new activity.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	ID of the channel to archive (e.g., C1234567890)

Output

Parameter	Type	Description
ok	boolean	Whether the conversation was archived successfully

Slack Rename Conversation

Rename an existing Slack channel.

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	ID of the channel to rename (e.g., C1234567890)
name	string	Yes	New channel name (lowercase letters, numbers, hyphens, underscores only; max 80 characters)

Output

Parameter	Type	Description
channelInfo	object	The channel object after renaming
↳ id	string	Channel ID (e.g., C1234567890)
↳ name	string	Channel name without # prefix
↳ is_channel	boolean	Whether this is a channel
↳ is_private	boolean	Whether channel is private
↳ is_archived	boolean	Whether channel is archived
↳ is_general	boolean	Whether this is the general channel
↳ is_member	boolean	Whether the bot/user is a member
↳ is_shared	boolean	Whether channel is shared across workspaces
↳ is_ext_shared	boolean	Whether channel is externally shared
↳ is_org_shared	boolean	Whether channel is org-wide shared
↳ num_members	number	Number of members in the channel
↳ topic	string	Channel topic
↳ purpose	string	Channel purpose/description
↳ created	number	Unix timestamp when channel was created
↳ creator	string	User ID of channel creator
↳ updated	number	Unix timestamp of last update

Slack Set Conversation Topic

Set the topic for a Slack channel (max 250 characters).

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	ID of the channel to update (e.g., C1234567890)
topic	string	Yes	New topic text (max 250 characters; no formatting or linkification)

Output

Parameter	Type	Description
channelInfo	object	The channel object after updating the topic
↳ id	string	Channel ID (e.g., C1234567890)
↳ name	string	Channel name without # prefix
↳ is_channel	boolean	Whether this is a channel
↳ is_private	boolean	Whether channel is private
↳ is_archived	boolean	Whether channel is archived
↳ is_general	boolean	Whether this is the general channel
↳ is_member	boolean	Whether the bot/user is a member
↳ is_shared	boolean	Whether channel is shared across workspaces
↳ is_ext_shared	boolean	Whether channel is externally shared
↳ is_org_shared	boolean	Whether channel is org-wide shared
↳ num_members	number	Number of members in the channel
↳ topic	string	Channel topic
↳ purpose	string	Channel purpose/description
↳ created	number	Unix timestamp when channel was created
↳ creator	string	User ID of channel creator
↳ updated	number	Unix timestamp of last update

Slack Set Conversation Purpose

Set the purpose (description) for a Slack channel (max 250 characters).

Inputs and outputs

Input

Parameter	Type	Required	Description
authMethod	string	No	Authentication method: oauth or bot_token
botToken	string	No	Bot token for Custom Bot
channel	string	Yes	ID of the channel to update (e.g., C1234567890)
purpose	string	Yes	New purpose/description text (max 250 characters)

Output

Parameter	Type	Description
purpose	string	The purpose/description that was set on the channel

Slack Revoke List Access

Remove access to a Slack List for either users or channels.

Inputs and outputs

Input

Parameter	Type	Required	Description
list_id	string	Yes	List ID
user_ids	json	No	User IDs
channel_ids	json	No	Channel IDs

Output

Parameter	Type	Description
ok	boolean	Ok

Slack Start List Export

Start an asynchronous CSV or JSON List export. Use the returned job_id with Get List Export and the same format options.

Inputs and outputs

Input

Parameter	Type	Required	Description
list_id	string	Yes	List ID
format	string	No	Export Format Options: csv, json.
include_threads	boolean	No	Include Threads
include_attachments	boolean	No	Include Attachments
include_archived	boolean	No	Include Archived Rows

Output

Parameter	Type	Description
ok	boolean	Ok
job_id	string	Job id

Slack Get List Export

Read a List export job status and its download URL when ready. Format, Include Threads, and Include Attachments must match Start List Export.

Inputs and outputs

Input

Parameter	Type	Required	Description
list_id	string	Yes	List ID
job_id	string	Yes	Export Job ID
format	string	No	Export Format Options: csv, json.
include_threads	boolean	No	Include Threads
include_attachments	boolean	No	Include Attachments

Output

Parameter	Type	Description
ok	boolean	Ok
status	string	Status
download_url	string	Download url

Slack Delete List Items

Delete multiple rows from a Slack List in one call.

Inputs and outputs

Input

Parameter	Type	Required	Description
list_id	string	Yes	List ID
ids	json	Yes	Row IDs

Output

Parameter	Type	Description
ok	boolean	Ok

Slack Share Canvas

Change access for users or regular channels on a standalone canvas. For sharing, first send the canvas link in Slack to the target. Channel resource canvases cannot be changed this way.

Inputs and outputs

Input

Parameter	Type	Required	Description
canvas_id	string	Yes	Canvas ID
access_level	string	Yes	Access Level Options: read, write, owner.
user_ids	json	No	User IDs
channel_ids	json	No	Channel IDs

Output

Parameter	Type	Description
ok	boolean	Ok

Slack Revoke Canvas Access

Remove user or regular-channel access to a standalone canvas. Channel-granted access must be revoked at the channel level.

Inputs and outputs

Input

Parameter	Type	Required	Description
canvas_id	string	Yes	Canvas ID
user_ids	json	No	User IDs
channel_ids	json	No	Channel IDs

Output

Parameter	Type	Description
ok	boolean	Ok

Slack Join Conversation

Join a public Slack channel as the authenticated bot.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel	string	Yes	Channel ID

Output

Parameter	Type	Description
ok	boolean	Ok
conversation	object	Conversation
↳ id	string	Id
↳ name	string	Name
↳ creator	string	Creator
↳ user	string	User
↳ last_read	string	Last read
↳ is_archived	boolean	Is archived
↳ is_private	boolean	Is private
↳ is_im	boolean	Is im
↳ is_mpim	boolean	Is mpim
↳ is_member	boolean	Is member
↳ is_open	boolean	Is open
↳ created	number	Created
↳ topic	object	Topic
↳ value	string	Value
↳ creator	string	Creator
↳ last_set	number	Last set
↳ purpose	object	Purpose
↳ value	string	Value
↳ creator	string	Creator
↳ last_set	number	Last set

Slack Leave Conversation

Leave a Slack channel as the authenticated identity.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel	string	Yes	Channel ID

Output

Parameter	Type	Description
ok	boolean	Ok

Slack Remove User from Conversation

Remove a user from a Slack conversation, subject to workspace permissions.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel	string	Yes	Channel ID
user	string	Yes	User ID

Output

Parameter	Type	Description
ok	boolean	Ok

Slack Unarchive Conversation

Restore an archived Slack channel.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel	string	Yes	Channel ID

Output

Parameter	Type	Description
ok	boolean	Ok

Slack Close Conversation

Close a direct message or group direct message for the authenticated identity.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel	string	Yes	Channel ID

Output

Parameter	Type	Description
ok	boolean	Ok

Slack Mark Conversation Read

Move the authenticated identity’s read cursor to a message timestamp.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel	string	Yes	Channel ID
ts	string	Yes	Read Through Timestamp

Output

Parameter	Type	Description
ok	boolean	Ok

Slack Open Conversation

Open a DM or group DM with 1–8 user IDs, or resume a conversation by ID. Supply exactly one target; omit the calling user from User IDs.

Inputs and outputs

Input

Parameter	Type	Required	Description
users	json	No	User IDs
channel	string	No	Conversation ID
prevent_creation	boolean	No	Only Resume Existing Conversation
return_im	boolean	No	Include Conversation Details

Output

Parameter	Type	Description
ok	boolean	Ok
conversation	object	Conversation
↳ id	string	Id
↳ name	string	Name
↳ creator	string	Creator
↳ user	string	User
↳ last_read	string	Last read
↳ is_archived	boolean	Is archived
↳ is_private	boolean	Is private
↳ is_im	boolean	Is im
↳ is_mpim	boolean	Is mpim
↳ is_member	boolean	Is member
↳ is_open	boolean	Is open
↳ created	number	Created
↳ topic	object	Topic
↳ value	string	Value
↳ creator	string	Creator
↳ last_set	number	Last set
↳ purpose	object	Purpose
↳ value	string	Value
↳ creator	string	Creator
↳ last_set	number	Last set

Slack Find User by Email

Find a Slack user by their email address.

Inputs and outputs

Input

Parameter	Type	Required	Description
email	string	Yes	Email

Output

Parameter	Type	Description
ok	boolean	Ok
user	object	User
↳ id	string	Id
↳ name	string	Name
↳ real_name	string	Real name
↳ team_id	string	Team id
↳ deleted	boolean	Deleted
↳ is_bot	boolean	Is bot
↳ profile	object	Profile
↳ title	string	Title
↳ phone	string	Phone
↳ real_name	string	Real name
↳ display_name	string	Display name
↳ email	string	Email
↳ first_name	string	First name
↳ last_name	string	Last name
↳ status_text	string	Status text
↳ status_emoji	string	Status emoji
↳ image_48	string	Image 48
↳ image_192	string	Image 192
↳ image_512	string	Image 512
↳ pronouns	string	Pronouns
↳ start_date	string	Start date
↳ status_expiration	number	Status expiration
↳ fields	json	Fields

Slack List User Conversations

List one page of conversations accessible to the selected user. Continue with response_metadata.next_cursor.

Inputs and outputs

Input

Parameter	Type	Required	Description
user	string	No	User ID
types	string	No	Comma-separated public_channel, private_channel, mpim, im.
exclude_archived	boolean	No	Exclude Archived
exclude_muted	boolean	No	Exclude Muted
cursor	string	No	Cursor
limit	number	No	Page Size
team_id	string	No	Workspace ID

Output

Parameter	Type	Description
ok	boolean	Ok
channels	array	Channels
↳ id	string	Id
↳ name	string	Name
↳ creator	string	Creator
↳ user	string	User
↳ last_read	string	Last read
↳ is_archived	boolean	Is archived
↳ is_private	boolean	Is private
↳ is_im	boolean	Is im
↳ is_mpim	boolean	Is mpim
↳ is_member	boolean	Is member
↳ is_open	boolean	Is open
↳ created	number	Created
↳ topic	object	Topic
↳ value	string	Value
↳ creator	string	Creator
↳ last_set	number	Last set
↳ purpose	object	Purpose
↳ value	string	Value
↳ creator	string	Creator
↳ last_set	number	Last set
response_metadata	object	Metadata
↳ next_cursor	string	Next cursor

Slack Get User Profile

Read a Slack user’s profile, status, and custom fields. Omit User ID for the authenticated identity.

Inputs and outputs

Input

Parameter	Type	Required	Description
user	string	No	User ID
include_labels	boolean	No	Include Custom Field Labels

Output

Parameter	Type	Description
ok	boolean	Ok
profile	object	Profile
↳ title	string	Title
↳ phone	string	Phone
↳ real_name	string	Real name
↳ display_name	string	Display name
↳ email	string	Email
↳ first_name	string	First name
↳ last_name	string	Last name
↳ status_text	string	Status text
↳ status_emoji	string	Status emoji
↳ image_48	string	Image 48
↳ image_192	string	Image 192
↳ image_512	string	Image 512
↳ pronouns	string	Pronouns
↳ start_date	string	Start date
↳ status_expiration	number	Status expiration
↳ fields	json	Fields

Slack Set Bot Presence

Set the selected custom bot’s presence to away or automatic. This does not change a workspace member’s presence.

Inputs and outputs

Input

Parameter	Type	Required	Description
presence	string	Yes	Presence Options: auto, away.

Output

Parameter	Type	Description
ok	boolean	Ok

Slack Get File Info

Read Slack file metadata and one page of legacy file comments. Continue with response_metadata.next_cursor.

Inputs and outputs

Input

Parameter	Type	Required	Description
file	string	Yes	File ID
cursor	string	No	Cursor
limit	number	No	Page Size

Output

Parameter	Type	Description
ok	boolean	Ok
file	object	File
↳ id	string	Id
↳ name	string	Name
↳ title	string	Title
↳ mimetype	string	Mimetype
↳ filetype	string	Filetype
↳ user	string	User
↳ mode	string	Mode
↳ permalink	string	Permalink
↳ url_private	string	Url private
↳ url_private_download	string	Url private download
↳ size	number	Size
↳ created	number	Created
↳ is_public	boolean	Is public
↳ reactions	array	Reactions
↳ name	string	Name
↳ count	number	Count
↳ users	array	Users
comments	array	File comments, oldest first
↳ id	string	Comment ID
↳ comment	string	Comment text
↳ user	string	Author ID
↳ created	number	Creation timestamp
↳ timestamp	number	Comment timestamp
paging	object	Paging
↳ count	number	Count
↳ page	number	Page
↳ pages	number	Pages
↳ total	number	Total
response_metadata	object	Metadata
↳ next_cursor	string	Next cursor

Slack List Files

List one page of Slack files matching user, channel, type, or timestamp filters. Continue using paging.page and paging.pages.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel	string	No	Channel ID
user	string	No	User ID
types	string	No	File Types
ts_from	string	No	From Timestamp
ts_to	string	No	To Timestamp
page	number	No	Page
count	number	No	Page Size
show_files_hidden_by_limit	boolean	No	Include Files Hidden by Plan Limit
team_id	string	No	Workspace ID

Output

Parameter	Type	Description
ok	boolean	Ok
fileMetadata	array	Files
↳ id	string	Id
↳ name	string	Name
↳ title	string	Title
↳ mimetype	string	Mimetype
↳ filetype	string	Filetype
↳ user	string	User
↳ mode	string	Mode
↳ permalink	string	Permalink
↳ url_private	string	Url private
↳ url_private_download	string	Url private download
↳ size	number	Size
↳ created	number	Created
↳ is_public	boolean	Is public
↳ reactions	array	Reactions
↳ name	string	Name
↳ count	number	Count
↳ users	array	Users
paging	object	Paging
↳ count	number	Count
↳ page	number	Page
↳ pages	number	Pages
↳ total	number	Total

Slack Delete File

Permanently delete a Slack file the authenticated identity is allowed to delete.

Inputs and outputs

Input

Parameter	Type	Required	Description
file	string	Yes	File ID

Output

Parameter	Type	Description
ok	boolean	Ok

Slack Get Reactions

Get reactions for exactly one message, file, or file comment. Messages require both Channel ID and Message Timestamp.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel	string	No	Channel ID
timestamp	string	No	Message Timestamp
file	string	No	File ID
file_comment	string	No	File Comment ID
full	boolean	No	Include All Reacting Users

Output

Parameter	Type	Description
ok	boolean	Ok
type	string	Type
channel	string	Channel
message	object	Message
↳ type	string	Type
↳ text	string	Text
↳ user	string	User
↳ ts	string	Ts
↳ permalink	string	Permalink
↳ reactions	array	Reactions
↳ name	string	Name
↳ count	number	Count
↳ users	array	Users
file	object	File
↳ id	string	Id
↳ name	string	Name
↳ title	string	Title
↳ mimetype	string	Mimetype
↳ filetype	string	Filetype
↳ user	string	User
↳ mode	string	Mode
↳ permalink	string	Permalink
↳ url_private	string	Url private
↳ url_private_download	string	Url private download
↳ size	number	Size
↳ created	number	Created
↳ is_public	boolean	Is public
↳ reactions	array	Reactions
↳ name	string	Name
↳ count	number	Count
↳ users	array	Users
comment	object	Comment
↳ id	string	Id
↳ comment	string	Comment
↳ user	string	User
↳ reactions	array	Reactions
↳ name	string	Name
↳ count	number	Count
↳ users	array	Users

Slack List Reactions

List one page of items reacted to by a user. Continue with response_metadata.next_cursor.

Inputs and outputs

Input

Parameter	Type	Required	Description
user	string	No	User ID
full	boolean	No	Include All Reacting Users
cursor	string	No	Cursor
limit	number	No	Page Size
team_id	string	No	Workspace ID

Output

Parameter	Type	Description
ok	boolean	Ok
items	array	Items
↳ type	string	Type
↳ channel	string	Channel
↳ message	object	Message
↳ type	string	Type
↳ text	string	Text
↳ user	string	User
↳ ts	string	Ts
↳ permalink	string	Permalink
↳ reactions	array	Reactions
↳ name	string	Name
↳ count	number	Count
↳ users	array	Users
↳ file	object	File
↳ id	string	Id
↳ name	string	Name
↳ title	string	Title
↳ mimetype	string	Mimetype
↳ filetype	string	Filetype
↳ user	string	User
↳ mode	string	Mode
↳ permalink	string	Permalink
↳ url_private	string	Url private
↳ url_private_download	string	Url private download
↳ size	number	Size
↳ created	number	Created
↳ is_public	boolean	Is public
↳ reactions	array	Reactions
↳ name	string	Name
↳ count	number	Count
↳ users	array	Users
↳ comment	object	Comment
↳ id	string	Id
↳ comment	string	Comment
↳ user	string	User
↳ reactions	array	Reactions
↳ name	string	Name
↳ count	number	Count
↳ users	array	Users
↳ created	number	Created
↳ created_by	string	Created by
response_metadata	object	Metadata
↳ next_cursor	string	Next cursor

Slack Pin Message

Pin a message to its Slack conversation.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel	string	Yes	Channel ID
timestamp	string	Yes	Message Timestamp

Output

Parameter	Type	Description
ok	boolean	Ok

Slack Unpin Message

Remove a message from its conversation’s pinned items.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel	string	Yes	Channel ID
timestamp	string	Yes	Message Timestamp

Output

Parameter	Type	Description
ok	boolean	Ok

Slack List Pins

Read the pinned messages and files in a Slack conversation.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel	string	Yes	Channel ID

Output

Parameter	Type	Description
ok	boolean	Ok
items	array	Items
↳ type	string	Type
↳ channel	string	Channel
↳ message	object	Message
↳ type	string	Type
↳ text	string	Text
↳ user	string	User
↳ ts	string	Ts
↳ permalink	string	Permalink
↳ reactions	array	Reactions
↳ name	string	Name
↳ count	number	Count
↳ users	array	Users
↳ file	object	File
↳ id	string	Id
↳ name	string	Name
↳ title	string	Title
↳ mimetype	string	Mimetype
↳ filetype	string	Filetype
↳ user	string	User
↳ mode	string	Mode
↳ permalink	string	Permalink
↳ url_private	string	Url private
↳ url_private_download	string	Url private download
↳ size	number	Size
↳ created	number	Created
↳ is_public	boolean	Is public
↳ reactions	array	Reactions
↳ name	string	Name
↳ count	number	Count
↳ users	array	Users
↳ comment	object	Comment
↳ id	string	Id
↳ comment	string	Comment
↳ user	string	User
↳ reactions	array	Reactions
↳ name	string	Name
↳ count	number	Count
↳ users	array	Users
↳ created	number	Created
↳ created_by	string	Created by

Slack Add Bookmark

Add a link bookmark to a Slack channel.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel_id	string	Yes	Channel ID
title	string	Yes	Title
link	string	Yes	Link URL
emoji	string	No	Emoji
parent_id	string	No	Parent Bookmark ID

Output

Parameter	Type	Description
ok	boolean	Ok
bookmark	object	Bookmark
↳ id	string	Id
↳ channel_id	string	Channel id
↳ title	string	Title
↳ link	string	Link
↳ emoji	string	Emoji
↳ type	string	Type
↳ date_created	number	Date created
↳ date_updated	number	Date updated
↳ entity_id	string	Entity id

Slack Edit Bookmark

Change a channel link bookmark’s title, URL, or emoji.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel_id	string	Yes	Channel ID
bookmark_id	string	Yes	Bookmark ID
title	string	No	Title
link	string	No	Link URL
emoji	string	No	Emoji

Output

Parameter	Type	Description
ok	boolean	Ok
bookmark	object	Bookmark
↳ id	string	Id
↳ channel_id	string	Channel id
↳ title	string	Title
↳ link	string	Link
↳ emoji	string	Emoji
↳ type	string	Type
↳ date_created	number	Date created
↳ date_updated	number	Date updated
↳ entity_id	string	Entity id

Slack List Bookmarks

Read the bookmarks in a Slack channel.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel_id	string	Yes	Channel ID

Output

Parameter	Type	Description
ok	boolean	Ok
bookmarks	array	Bookmarks
↳ id	string	Id
↳ channel_id	string	Channel id
↳ title	string	Title
↳ link	string	Link
↳ emoji	string	Emoji
↳ type	string	Type
↳ date_created	number	Date created
↳ date_updated	number	Date updated
↳ entity_id	string	Entity id

Slack Remove Bookmark

Remove a bookmark from a Slack channel.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel_id	string	Yes	Channel ID
bookmark_id	string	Yes	Bookmark ID

Output

Parameter	Type	Description
ok	boolean	Ok

Slack Create User Group

Create a Slack user group with a mention handle and default channels. Requires a paid plan and permission to manage user groups.

Inputs and outputs

Input

Parameter	Type	Required	Description
name	string	Yes	Name
handle	string	No	Mention Handle
description	string	No	Description
channels	json	No	Default Channel IDs
additional_channels	json	No	Additional Channel IDs
enable_section	boolean	No	Show as Sidebar Section
include_count	boolean	No	Include Member Count
team_id	string	No	Workspace ID

Output

Parameter	Type	Description
ok	boolean	Ok
usergroup	object	Usergroup
↳ id	string	Id
↳ name	string	Name
↳ handle	string	Handle
↳ description	string	Description
↳ team_id	string	Team id
↳ users	array	Users
↳ user_count	json	User count
↳ date_create	number	Date create
↳ date_update	number	Date update
↳ date_delete	number	Date delete
↳ prefs	object	Prefs
↳ channels	array	Channels
↳ groups	array	Groups

Slack Update User Group

Change a Slack user group’s name, handle, description, or default channels. Requires permission to manage user groups.

Inputs and outputs

Input

Parameter	Type	Required	Description
usergroup	string	Yes	User Group ID
name	string	No	Name
handle	string	No	Mention Handle
description	string	No	Description
channels	json	No	Default Channel IDs
additional_channels	json	No	Additional Channel IDs
enable_section	boolean	No	Show as Sidebar Section
include_count	boolean	No	Include Member Count
team_id	string	No	Workspace ID

Output

Parameter	Type	Description
ok	boolean	Ok
usergroup	object	Usergroup
↳ id	string	Id
↳ name	string	Name
↳ handle	string	Handle
↳ description	string	Description
↳ team_id	string	Team id
↳ users	array	Users
↳ user_count	json	User count
↳ date_create	number	Date create
↳ date_update	number	Date update
↳ date_delete	number	Date delete
↳ prefs	object	Prefs
↳ channels	array	Channels
↳ groups	array	Groups

Slack Enable User Group

Reactivate a disabled Slack user group. Requires permission to manage user groups.

Inputs and outputs

Input

Parameter	Type	Required	Description
usergroup	string	Yes	User Group ID
include_count	boolean	No	Include Member Count
team_id	string	No	Workspace ID

Output

Parameter	Type	Description
ok	boolean	Ok
usergroup	object	Usergroup
↳ id	string	Id
↳ name	string	Name
↳ handle	string	Handle
↳ description	string	Description
↳ team_id	string	Team id
↳ users	array	Users
↳ user_count	json	User count
↳ date_create	number	Date create
↳ date_update	number	Date update
↳ date_delete	number	Date delete
↳ prefs	object	Prefs
↳ channels	array	Channels
↳ groups	array	Groups

Slack Disable User Group

Disable a Slack user group and remove its members. Requires permission to manage user groups.

Inputs and outputs

Input

Parameter	Type	Required	Description
usergroup	string	Yes	User Group ID
include_count	boolean	No	Include Member Count
team_id	string	No	Workspace ID

Output

Parameter	Type	Description
ok	boolean	Ok
usergroup	object	Usergroup
↳ id	string	Id
↳ name	string	Name
↳ handle	string	Handle
↳ description	string	Description
↳ team_id	string	Team id
↳ users	array	Users
↳ user_count	json	User count
↳ date_create	number	Date create
↳ date_update	number	Date update
↳ date_delete	number	Date delete
↳ prefs	object	Prefs
↳ channels	array	Channels
↳ groups	array	Groups

Slack List User Groups

Read Slack user groups, optionally including disabled groups, members, and member counts.

Inputs and outputs

Input

Parameter	Type	Required	Description
include_disabled	boolean	No	Include Disabled Groups
include_users	boolean	No	Include Members
include_count	boolean	No	Include Member Count
team_id	string	No	Workspace ID

Output

Parameter	Type	Description
ok	boolean	Ok
usergroups	array	Usergroups
↳ id	string	Id
↳ name	string	Name
↳ handle	string	Handle
↳ description	string	Description
↳ team_id	string	Team id
↳ users	array	Users
↳ user_count	json	User count
↳ date_create	number	Date create
↳ date_update	number	Date update
↳ date_delete	number	Date delete
↳ prefs	object	Prefs
↳ channels	array	Channels
↳ groups	array	Groups

Slack List User Group Members

Read the user IDs in a Slack user group.

Inputs and outputs

Input

Parameter	Type	Required	Description
usergroup	string	Yes	User Group ID
include_disabled	boolean	No	Include Disabled Users
team_id	string	No	Workspace ID

Output

Parameter	Type	Description
ok	boolean	Ok
users	array	Users

Slack Update User Group Members

Replace all members of a Slack user group with the supplied user IDs. An empty list is not supported; disable the group instead.

Inputs and outputs

Input

Parameter	Type	Required	Description
usergroup	string	Yes	User Group ID
users	json	Yes	User IDs
additional_channels	json	No	Additional Channel IDs
is_shared	boolean	No	Shared Section
include_count	boolean	No	Include Member Count
team_id	string	No	Workspace ID

Output

Parameter	Type	Description
ok	boolean	Ok
usergroup	object	Usergroup
↳ id	string	Id
↳ name	string	Name
↳ handle	string	Handle
↳ description	string	Description
↳ team_id	string	Team id
↳ users	array	Users
↳ user_count	json	User count
↳ date_create	number	Date create
↳ date_update	number	Date update
↳ date_delete	number	Date delete
↳ prefs	object	Prefs
↳ channels	array	Channels
↳ groups	array	Groups

Slack Get Do Not Disturb Info

Read a user’s Do Not Disturb schedule and available snooze information.

Inputs and outputs

Input

Parameter	Type	Required	Description
user	string	No	User ID
team_id	string	No	Workspace ID

Output

Parameter	Type	Description
ok	boolean	Ok
dnd_enabled	boolean	Dnd enabled
next_dnd_start_ts	number	Next dnd start ts
next_dnd_end_ts	number	Next dnd end ts
snooze_enabled	boolean	Snooze enabled
snooze_endtime	number	Snooze endtime
snooze_remaining	number	Snooze remaining
snooze_is_indefinite	boolean	Snooze is indefinite

Slack Get Team Do Not Disturb Info

Read Do Not Disturb settings for the supplied user IDs.

Inputs and outputs

Input

Parameter	Type	Required	Description
users	json	Yes	User IDs
team_id	string	No	Workspace ID

Output

Parameter	Type	Description
ok	boolean	Ok
users	json	Users

Slack List Custom Emoji

List workspace custom emoji as names mapped to image URLs or alias references.

Inputs and outputs

Input

Parameter	Type	Required	Description

Output

Parameter	Type	Description
ok	boolean	Ok
emoji	json	Custom emoji names mapped to image URLs or alias:name values

Slack Get Workspace Info

Read a Slack workspace’s name, domain, icon, and available organization details.

Inputs and outputs

Input

Parameter	Type	Required	Description
team	string	No	Workspace ID
domain	string	No	Workspace Domain

Output

Parameter	Type	Description
ok	boolean	Ok
team	object	Team
↳ id	string	Id
↳ name	string	Name
↳ domain	string	Domain
↳ email_domain	string	Email domain
↳ enterprise_id	string	Enterprise id
↳ enterprise_name	string	Enterprise name
↳ icon	object	Icon
↳ image_34	string	Image 34
↳ image_132	string	Image 132
↳ image_default	boolean	Image default

Slack Get Workspace Profile Fields

Read the workspace’s custom profile field definitions, optionally filtered by visibility.

Inputs and outputs

Input

Parameter	Type	Required	Description
visibility	string	No	Visibility Options: all, visible, hidden.

Output

Parameter	Type	Description
ok	boolean	Ok
profile	object	Teamprofile
↳ fields	array	Fields
↳ id	string	Id
↳ label	string	Label
↳ hint	string	Hint
↳ type	string	Type
↳ ordering	number	Ordering
↳ is_hidden	boolean	Is hidden
↳ section_id	string	Section id
↳ possible_values	array	Possible values
↳ sections	array	Sections
↳ id	string	Id
↳ label	string	Label
↳ section_type	string	Section type
↳ order	number	Order
↳ is_hidden	boolean	Is hidden

Slack Unfurl Links

Attach custom previews to links already shared in a message. Configure the relevant unfurl domains in your Slack app.

Inputs and outputs

Input

Parameter	Type	Required	Description
channel	string	Yes	Channel ID
ts	string	Yes	Message Timestamp
unfurls	json	Yes	JSON object keyed by each shared URL, with Slack attachment fields or blocks as the value.

Output

Parameter	Type	Description
ok	boolean	Ok

Triggers

A trigger starts a workflow when a supported event occurs in this service.

Slack

Trigger from Slack events, interactions, and slash commands

Configuration and outputs

Configuration

Parameter	Type	Required	Description
eventType	string	Yes	The single Slack event this trigger fires on. Add another trigger block for another event.
customBotCredential	string	Yes	Choose a custom Slack bot you set up once and reuse across triggers.
manualBotCredential	string	Yes	Set the custom bot credential ID directly.
source	string	No	Restrict to direct messages, public channels, or private channels. Leave empty to match any.
channelFilter	channel-selector	No	Restrict to specific channels. Leave empty to trigger on any channel the bot has been added to.
manualChannelFilter	string	No	Comma-separated channel IDs to restrict to. Set IDs directly here.
threads	string	No	Include thread replies, exclude them (top-level only), or fire only on thread replies.
streamResponse	boolean	No	Create a Slack agent session and stream selected workflow outputs into the conversation that started this run. Custom bots only.
streamOutputs	workflow-output-selector	No	Use <blockName>.<outputPath> for this workflow or <childWorkflowId>.<blockName>.<outputPath> for a child workflow. Selecting a child workflow applies to every invocation of it. Agent outputs stream live; other outputs are sent when the block completes.
streamTaskTitle	string	No	Optional status Slack shows while each selected response is being produced. Leave empty to use Running.
streamTaskDisplayMode	string	No	Choose how Slack displays thinking and tool progress.
streamIncludeThinking	boolean	No	Show agent thinking as Slack task updates while the response is generated.
streamIncludeToolCalls	boolean	No	Show Agent and Sim Chat tool execution progress as Slack task updates.
emoji	string	No	Comma-separated emoji names to restrict to. Leave empty to match any emoji.
nameContains	string	No	Only fire when the created channel name contains this text.
interactionFilter	string	No	Comma-separated action_ids (buttons/selects) or callback_ids (modals) to restrict to. Leave empty to fire on any interaction.
commandFilter	string	No	Restrict this trigger to one slash command. Leave empty to fire for every command configured on the bot.
filterBotMessages	boolean	No	Ignore messages sent by other bots. This app's own output is always ignored.
includeOwnMessages	boolean	No	Also fire on this app's own messages and reactions. Can cause loops — use with care.
includeFiles	boolean	No	Download and include file attachments from messages. Requires files:read.

Output

Parameter	Type	Description
event	object	Slack event data
↳ event_type	string	Type of Slack payload: an Events API event (e.g., app_mention, message), an interactivity type (e.g., block_actions), or "slash_command" for slash commands
↳ subtype	string	Message subtype (e.g., channel_join, channel_leave, bot_message, file_share). Null for regular user messages
↳ channel	string	Slack channel ID where the event occurred
↳ channel_name	string	Human-readable channel name
↳ channel_type	string	Type of channel (e.g., channel, group, im, mpim). Useful for distinguishing DMs from public channels
↳ user	string	User ID who triggered the event
↳ user_name	string	Username who triggered the event
↳ bot_id	string	Bot ID if the message was sent by a bot. Null for human users
↳ text	string	Message text content. For slash commands, the text after the command. For interactivity, the source message text (falls back to the triggering action value)
↳ timestamp	string	Message timestamp from the triggering event
↳ thread_ts	string	Parent thread timestamp (if message is in a thread)
↳ streaming_message_ts	array	Message timestamps streamed during a stopped agent session
↳ title	string	Current agent session title
↳ previous_title	string	Previous agent session title
↳ tab	string	App Home tab that was opened, including messages for Agent View
↳ context	json	Current Agent View context. Normalized from context on app_context_changed/app_home_opened or app_context on message.im
↳ team_id	string	Slack workspace/team ID
↳ user_team_id	string	Slack workspace/team ID of the user who triggered the event. Used for Slack Connect response streaming.
↳ enterprise_id	string	Slack Enterprise Grid organization ID
↳ event_id	string	Unique event identifier
↳ reaction	string	Emoji reaction name (e.g., thumbsup). Present for reaction_added/reaction_removed events
↳ item_user	string	User ID of the original message author. Present for reaction_added/reaction_removed events
↳ command	string	Slash command name including the leading slash (e.g., /deploy). Present for slash commands
↳ action_id	string	action_id of the first interactive element triggered. Present for block_actions (button/select clicks)
↳ action_value	string	Value carried by the first interactive element (button value, selected option, date, etc.). Present for block_actions
↳ actions	json	Full array of interactive actions from the payload, preserving every element and its value. Present for block_actions
↳ response_url	string	Temporary URL to post a response back to the originating message or command. Present for interactivity and slash commands
↳ trigger_id	string	Short-lived trigger ID used to open a modal in response. Present for interactivity and slash commands
↳ callback_id	string	Callback ID of the shortcut or view. Present for shortcuts and modal submissions
↳ api_app_id	string	Slack app ID. Present for interactivity and slash commands
↳ app_id	string	App ID of the app that produced the event (e.g. the bot that posted a message). Used to identify the app's own output
↳ message_ts	string	Timestamp of the message the interaction originated from. Present for block_actions
↳ view	json	Full Slack view object for modal interactions: state.values (submitted input values), private_metadata, id, callback_id, and hash. Present for view_submission/view_closed; null otherwise
↳ message	json	Full source message object the interaction came from, including its blocks and text. Present for block_actions on a message; null otherwise
↳ state	json	Current values of all stateful elements in the surface (state.values) at the time of a block action — e.g. inputs read on a button click. Present for block_actions; null otherwise
↳ hasFiles	boolean	Whether the message has file attachments
↳ files	file[]	File attachments downloaded from the message (if includeFiles is enabled and bot token is provided)

Lists and Canvas notes

Lists

Lists actions require a custom Slack bot and a paid Slack plan. Manage Lists is selected by default during bot setup. For an existing app, add lists:read and lists:write in Slack, reinstall it, then reconnect in Sim.

• Share List grants access to users or channels. Choose Share With, enter a JSON array of Slack IDs, and select Can view, Can edit, or Owner. Ownership is for users only and requires the current owner. Creating a List does not automatically share it with your personal Slack account. See Slack's sharing reference.
• Run Read List Items with Include List Schema enabled to get the column IDs used in column_id. Updates also need the row's id as row_id.
• Initial Fields and Cells accept JSON arrays of typed values. Text uses rich_text; checkboxes use booleans. See Slack's field formats for examples.
• To read every row, pass nextCursor into Cursor until it is empty. Archived Rows reads archived rows instead of active rows.

Canvases

For custom bots, Manage canvases is selected by default during setup. Existing apps need canvases:write for changes, canvases:read for section lookup, and files:read for metadata. Reinstall the app after changing scopes, then reconnect in Sim.

Edit Canvas can replace the whole document when Section ID is empty. Get Canvas Info and List Canvases return metadata, not document contents. See Slack's Canvas guide for details.