---
title: "Cancel a request"
method: POST
path: "/v1/missions/submissions/{submission_id}/cancel"
tags: ["missions"]
---

# Cancel a request

`POST /v1/missions/submissions/{submission_id}/cancel`

## Request

- Base URL: `https://api.qualgent.ai`
- URL: `https://api.qualgent.ai/v1/missions/submissions/{submission_id}/cancel`
- Auth: API key in header `x-api-key`
- TypeScript: <https://skmtc.dev/qualgent/apis/qualgent-api-service/docs/v1/missions/submissions/:submission_id/cancel/post.ts> (a function with typed inputs; its response is checked against the schema)

Cancel a whole request. Only possible while nothing in it has started; once a
    tester or the agent has begun, the request is QualGent's to finish.

    A cancelled request is removed and no longer appears in `GET /v1/missions/submissions`.

## Path parameters

- `submission_id` string, uuid, required

## Headers

- `x-api-key` string

## Response `200`

Request cancelled and removed

- unknown

## Other responses

- `401`: Invalid or missing API key
- `403`: Your role does not allow cancelling
- `404`: Request not found
- `409`: The request has already started
- `422`: Validation Error
- `502`: Upstream service error

## Changes

- **2026-10-07** `659dfde2d76c`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/qualgent/apis/qualgent-api-service/changes/v1/missions/submissions/:submission_id/cancel/post.md)

---

[API](https://skmtc.dev/qualgent/apis/qualgent-api-service.md) - [All operations](https://skmtc.dev/qualgent/apis/qualgent-api-service/llms.txt) - [OpenAPI document](https://skmtc.dev/qualgent/apis/qualgent-api-service/revisions/e04a6e95240e?raw)