Resume workflow run

Resume one human-in-the-loop pause with workspace write access. The resumed attempt receives a new run ID and returns a synchronous result or queue receipt. A run that originally streamed resumes asynchronously through v2; this endpoint returns no SSE stream.

OAuth scope: api:write.

POST/api/v2/workflows/{workflowId}/runs/{runId}/resume

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/workflows/string/runs/run_8f14e45f-ceea-467f-a/resume" \  -H "X-API-Key: YOUR_API_KEY" \  -H "Content-Type: application/json" \  -d '{    "contextId": "ctx_123",    "input": {      "approved": true    }  }'
const body = JSON.stringify({  "contextId": "ctx_123",  "input": {    "approved": true  }})fetch("https://www.sim.ai/api/v2/workflows/string/runs/run_8f14e45f-ceea-467f-a/resume", {  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/workflows/string/runs/run_8f14e45f-ceea-467f-a/resume"  body := strings.NewReader(`{    "contextId": "ctx_123",    "input": {      "approved": true    }  }`)  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/workflows/string/runs/run_8f14e45f-ceea-467f-a/resume"body = """{  "contextId": "ctx_123",  "input": {    "approved": true  }}"""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("""{  "contextId": "ctx_123",  "input": {    "approved": true  }}""");HttpClient client = HttpClient.newBuilder()  .connectTimeout(Duration.ofSeconds(10))  .build();HttpRequest.Builder requestBuilder = HttpRequest.newBuilder()  .uri(URI.create("https://www.sim.ai/api/v2/workflows/string/runs/run_8f14e45f-ceea-467f-a/resume"))  .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("""{  "contextId": "ctx_123",  "input": {    "approved": true  }}""", 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/workflows/string/runs/run_8f14e45f-ceea-467f-a/resume", body);var responseBody = await response.Content.ReadAsStringAsync();
{
  "data": {
    "runId": "run_8f14e45f-ceea-467f-a",
    "workflowId": "3b1f7c92-8d4e-4a6b-9c0d-5e2f8a714b36",
    "status": "completed",
    "output": {
      "result": "Ticket routed to Support"
    },
    "blockOutputs": null,
    "error": null,
    "startedAt": "2026-08-09T18:04:10.000Z",
    "endedAt": "2026-08-09T18:04:11.000Z",
    "durationMs": 1000
  }
}
{
  "data": {
    "runId": "run_8f14e45f-ceea-467f-a",
    "statusUrl": "https://www.sim.ai/api/v2/workflows/3b1f7c92-8d4e-4a6b-9c0d-5e2f8a714b36/runs/run_8f14e45f-ceea-467f-a"
  }
}
{
  "error": {
    "code": "BAD_REQUEST",
    "message": "Invalid request"
  }
}
{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "Authentication required"
  }
}
{
  "error": {
    "code": "USAGE_LIMIT_EXCEEDED",
    "message": "Usage limit exceeded. Please upgrade your plan to continue."
  }
}
{
  "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 current resource state"
  }
}
{
  "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"
  }
}

Path parameters

workflowId*string

Unique workflow identifier.

Length1 <= length
runId*string

Unique workflow run identifier.

Match^[A-Za-z0-9._:-]+$
Length1 <= length <= 128

Request body

application/json

Pause context and optional input used to resume a workflow run.

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

application/json

application/json

GETDownload workflow run filePOSTCancel workflow run