Create workflow MCP server

Create an MCP server exposing deployed workflows as tools. Every supplied workflow must already be deployed. With isPublic: true, anyone holding the server URL can execute its workflows without a Sim API key. Requires workspace Admin access. Workspace API keys return 403; use a personal API key or scoped OAuth token.

OAuth scope: api:write.

POST/api/v2/workflow-mcp-servers

Authorization

X-API-Key<token>

Send a personal or workspace API key in X-API-Key. See key types and access; operations that reject workspace keys say so in their description.

In: header

Request examples use an API key. For OAuth, replace the X-API-Key header with Authorization: Bearer YOUR_ACCESS_TOKEN.

curl -X POST "https://www.sim.ai/api/v2/workflow-mcp-servers" \  -H "X-API-Key: YOUR_API_KEY" \  -H "Content-Type: application/json" \  -d '{    "workspaceId": "9f4c2a10-3b7e-4d58-8f6a-2c1d0e5b7a94",    "name": "Support agents",    "workflowIds": [      "3b1f7c92-8d4e-4a6b-9c0d-5e2f8a714b36"    ]  }'
const body = JSON.stringify({  "workspaceId": "9f4c2a10-3b7e-4d58-8f6a-2c1d0e5b7a94",  "name": "Support agents",  "workflowIds": [    "3b1f7c92-8d4e-4a6b-9c0d-5e2f8a714b36"  ]})fetch("https://www.sim.ai/api/v2/workflow-mcp-servers", {  method: "POST",  headers: {    "Content-Type": "application/json",    "X-API-Key": "YOUR_API_KEY"  },  body})
package mainimport (  "fmt"  "net/http"  "io/ioutil"  "strings")func main() {  url := "https://www.sim.ai/api/v2/workflow-mcp-servers"  body := strings.NewReader(`{    "workspaceId": "9f4c2a10-3b7e-4d58-8f6a-2c1d0e5b7a94",    "name": "Support agents",    "workflowIds": [      "3b1f7c92-8d4e-4a6b-9c0d-5e2f8a714b36"    ]  }`)  req, _ := http.NewRequest("POST", url, body)  req.Header.Add("X-API-Key", "YOUR_API_KEY")  req.Header.Add("Content-Type", "application/json")  res, _ := http.DefaultClient.Do(req)  defer res.Body.Close()  body, _ := ioutil.ReadAll(res.Body)  fmt.Println(res)  fmt.Println(string(body))}
import requestsurl = "https://www.sim.ai/api/v2/workflow-mcp-servers"body = """{  "workspaceId": "9f4c2a10-3b7e-4d58-8f6a-2c1d0e5b7a94",  "name": "Support agents",  "workflowIds": [    "3b1f7c92-8d4e-4a6b-9c0d-5e2f8a714b36"  ]}"""response = requests.request("POST", url, data = body, headers = {  "Content-Type": "application/json",   "X-API-Key": "YOUR_API_KEY"})print(response.text)
import java.net.URI;import java.net.http.HttpClient;import java.net.http.HttpRequest;import java.net.http.HttpResponse;import java.net.http.HttpResponse.BodyHandlers;import java.time.Duration;import java.net.http.HttpRequest.BodyPublishers;var body = BodyPublishers.ofString("""{  "workspaceId": "9f4c2a10-3b7e-4d58-8f6a-2c1d0e5b7a94",  "name": "Support agents",  "workflowIds": [    "3b1f7c92-8d4e-4a6b-9c0d-5e2f8a714b36"  ]}""");HttpClient client = HttpClient.newBuilder()  .connectTimeout(Duration.ofSeconds(10))  .build();HttpRequest.Builder requestBuilder = HttpRequest.newBuilder()  .uri(URI.create("https://www.sim.ai/api/v2/workflow-mcp-servers"))  .header("X-API-Key", "YOUR_API_KEY")  .header("Content-Type", "application/json")  .POST(body)  .build();try {  HttpResponse<String> response = client.send(requestBuilder.build(), BodyHandlers.ofString());  System.out.println("Status code: " + response.statusCode());  System.out.println("Response body: " + response.body());} catch (Exception e) {  e.printStackTrace();}
using System;using System.Net.Http;using System.Text;var body = new StringContent("""{  "workspaceId": "9f4c2a10-3b7e-4d58-8f6a-2c1d0e5b7a94",  "name": "Support agents",  "workflowIds": [    "3b1f7c92-8d4e-4a6b-9c0d-5e2f8a714b36"  ]}""", Encoding.UTF8, "application/json");var client = new HttpClient();client.DefaultRequestHeaders.Add("X-API-Key", "YOUR_API_KEY");var response = await client.PostAsync("https://www.sim.ai/api/v2/workflow-mcp-servers", body);var responseBody = await response.Content.ReadAsStringAsync();
{
  "data": {
    "id": "wfmcp_01J8ZK3QW4M6X2R9T7B5C0V2",
    "name": "Support agents",
    "description": "Ticket triage and escalation workflows.",
    "isPublic": false,
    "mcpServerUrl": "https://www.sim.ai/api/mcp/serve/wfmcp_01J8ZK3QW4M6X2R9T7B5C0V2",
    "createdAt": "2026-06-12T10:30:00.000Z",
    "updatedAt": "2026-06-12T10:30:00.000Z"
  }
}
{
  "error": {
    "code": "BAD_REQUEST",
    "message": "Invalid request"
  }
}
{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "Authentication required"
  }
}
{
  "error": {
    "code": "FORBIDDEN",
    "message": "Insufficient workspace permissions",
    "details": {
      "code": "INSUFFICIENT_WORKSPACE_ROLE"
    }
  }
}
{
  "error": {
    "code": "NOT_FOUND",
    "message": "Not found"
  }
}
{
  "error": {
    "code": "CONFLICT",
    "message": "The request conflicts with the current state of the resource"
  }
}
{
  "error": {
    "code": "PAYLOAD_TOO_LARGE",
    "message": "Request body is too large"
  }
}
{
  "error": {
    "code": "UNSUPPORTED_MEDIA_TYPE",
    "message": "Request body must be sent as application/json"
  }
}
{
  "error": {
    "code": "RATE_LIMITED",
    "message": "API rate limit exceeded",
    "details": {
      "retryAfter": "2026-01-01T00:00:30.000Z"
    }
  }
}
{
  "error": {
    "code": "INTERNAL_ERROR",
    "message": "Internal server error"
  }
}
{
  "error": {
    "code": "SERVICE_UNAVAILABLE",
    "message": "Service temporarily unavailable"
  }
}

Request body

application/json

A new workflow MCP server and deployed workflows to expose as tools.

TypeScript definitions

Use the request body type in TypeScript.

Response body

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

application/json

POSTCreate MCP serverDELETEDelete MCP server