curl --request POST \
  --url http://localhost:3500/v1/workflow-runs/{id}/cancel \
  --header 'Authorization: Bearer <token>'

const options = {method: 'POST', headers: {Authorization: 'Bearer <token>'}};

fetch('http://localhost:3500/v1/workflow-runs/{id}/cancel', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "http://localhost:3500/v1/workflow-runs/{id}/cancel"

headers = {"Authorization": "Bearer <token>"}

response = requests.post(url, headers=headers)

print(response.text)

{
  "id": "44444444-4444-4444-8444-444444444444",
  "retry_of_run_id": null,
  "type": "invoice_import",
  "resource": {
    "type": "invoice_import",
    "id": "33333333-3333-4333-8333-333333333333"
  },
  "status": "cancelled",
  "progress": {
    "total": 1,
    "queued": 0,
    "running": 0,
    "completed": 0,
    "skipped": 0,
    "failed": 0,
    "cancelled": 1
  },
  "created_at": "2026-09-08T12:00:00.000Z",
  "updated_at": "2026-09-08T12:00:30.000Z",
  "started_at": "2026-09-08T12:00:02.000Z",
  "finished_at": "2026-09-08T12:00:30.000Z",
  "failure": null
}

{
  "error": {
    "code": "validation_error",
    "message": "Invalid request format, parameters, or body. Details contain up to 20 actionable field errors; the complete encoded request body must be at most 2 MiB (2,097,152 bytes).",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "invalid_token",
    "message": "Missing or invalid bearer credential.",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "forbidden",
    "message": "Access denied: forbidden, token_disabled, organization_required, insufficient_role, or mfa_required. Check the error code and effective permissions.",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "not_found",
    "message": "The resource does not exist in the current organization.",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "conflict",
    "message": "This run completed, failed, or was superseded and cannot be cancelled.",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "rate_limit_exceeded",
    "message": "The IP or authenticated credential exceeded its request limit.",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "internal_error",
    "message": "Unexpected server failure. Include the request ID when contacting support.",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "service_unavailable",
    "message": "Authentication infrastructure is unavailable or rate limited. Honor Retry-After when provided.",
    "request_id": "req_example"
  }
}