---
title: "Stop a run"
description: "The run stops where it is."
canonical: "https://grid82.com/docs/builder-api/workflows/runs-cancel"
updated: "2026-11-13"
---

# Stop a run

`POST https://studio.grid82.app/v1/apps/{appId}/workflow-runs/{runId}/cancel`

The run stops where it is.

What it already changed stays changed.

Requires the `workflows:write` scope. Operation `workflows.runs.cancel`. MCP tool `workflows_runs_cancel`. CLI: `grid82 workflows runs cancel` (`npx grid82`).

## Path parameters

| Name    | Type   | Required | Description |
| ------- | ------ | -------- | ----------- |
| `appId` | string | yes      |             |
| `runId` | string | yes      |             |

## Headers

| Name              | Type   | Required | Description                                                                                                                                                                                                                                                        |
| ----------------- | ------ | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `Idempotency-Key` | string | no       | Any unique string. Sending the same key with the same request again returns the first response (marked `Idempotency-Replayed: true`) instead of running it twice. Reusing it for a different request is refused with 409. Kept for 24 hours. Up to 255 characters. |

**Authorizations**

- `Authorization` (bearer, in header, required)

## Response

**200**: Success

- `data` (`object`, required)
- `data.runId` (`string`, required)

```json
{
  "data": {
    "runId": "<string>"
  }
}
```

**4XX**: Refused

- `error` (`object`, required)
- `error.code` (`enum<string>`, required, one of: `not_found, forbidden, unauthenticated, validation_failed, conflict, rate_limited, payment_required, not_implemented, internal`)
- `error.message` (`string`, required)
- `error.details` (`Record<string, unknown>`)

```json
{
  "error": {
    "code": "not_found",
    "message": "<string>",
    "details": {}
  }
}
```

**Example request**

```bash
curl --request POST \
  --url 'https://studio.grid82.app/v1/apps/<appId>/workflow-runs/<runId>/cancel' \
  --header 'Authorization: Bearer <token>'
```