---
title: "Cancel a running or waiting workflow run"
method: POST
path: "/api/workflow-runs/{id}/cancel"
tags: ["Workflows"]
---

# Cancel a running or waiting workflow run

`POST /api/workflow-runs/{id}/cancel`

## Path parameters

- `id` string, required

## Request body

- object
  - `reason` string

## Response `200`

Run cancelled

- object
  - `success` true, required

## Other responses

- `400` — Cannot cancel

## Changes

- **2026-08-07** `06cac6a7c5bc` — 2 info
  - added the media type `application/json` for the response with the status `200`
  - added the media type `application/json` for the response with the status `400`

[Change history](https://skmtc.dev/desplega-ai/apis/agent-swarm-api/changes/api/workflow-runs/:id/cancel/post.md)

---

[API](https://skmtc.dev/desplega-ai/apis/agent-swarm-api.md) · [All operations](https://skmtc.dev/desplega-ai/apis/agent-swarm-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/desplega-ai/agent-swarm-api/revisions/8cde933218b5/schema)