---
title: "Changes to Cancel a ChatKit session"
method: POST
path: "/chatkit/sessions/{session_id}/cancel"
---

# Changes to Cancel a ChatKit session

`POST /chatkit/sessions/{session_id}/cancel`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 5 of 397 revisions.

- **2026-10-06** `e2f8d8cbc41f`: 3 info
- **2026-10-01** `5755b1f28268`: 1 breaking
- **2026-09-25** `d86203de41ae`: 3 info
- **2026-05-13** `74cbcf73838f`: 1 info
- **2026-04-10** `7c540cce6eb3`: 1 info

## Changes

- **2026-10-06** `e2f8d8cbc41f`: 3 info
  - added the optional property `error/misalignment/review_target` to the response with the `400` status
  - added the optional property `error/misalignment/review_target` to the response with the `404` status
  - added the optional property `error/misalignment/review_target` to the response with the `429` status
- **2026-10-01** `5755b1f28268`: 1 breaking
  - response property `workflow/state_variables/anyOf[subschema #1]/additionalProperties/` list-of-types was widened by adding types `null` to media type `application/json` of response `200`
- **2026-09-25** `d86203de41ae`: 3 info
  - added the non-success response with the status `400`
  - added the non-success response with the status `404`
  - added the non-success response with the status `429`
- **2026-05-13** `74cbcf73838f`: 1 info
  - endpoint added
- **2026-04-10** `7c540cce6eb3`: 1 info
  - endpoint added

---

[Operation](https://skmtc.dev/openai/apis/openapi/docs/chatkit/sessions/:session_id/cancel/post.md) - [API](https://skmtc.dev/openai/apis/openapi.md) - [Page](https://skmtc.dev/openai/apis/openapi/changes/chatkit/sessions/:session_id/cancel/post)