---
title: "Changes to Update Message"
method: PATCH
path: "/v0/inboxes/{inbox_id}/messages/{message_id}"
---

# Changes to Update Message

`PATCH /v0/inboxes/{inbox_id}/messages/{message_id}`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 4 of 38 revisions.

- **2026-10-16** `3f5c7830c952`: 2 breaking, 5 info
- **2026-07-15** `394ddcdd9c29`: 7 info
- **2026-03-31** `5b7e1869efdc`: 2 info
- **2026-03-31** `27965096e618`: 8 breaking, 13 warning

## Changes

- **2026-10-16** `3f5c7830c952`: 2 breaking, 5 info
  - the request property `add_labels` became not nullable
  - the request property `remove_labels` became not nullable
  - the endpoint scheme security `Bearer` was added to the API
  - the endpoint scheme security `BearerAuth` was removed from the API
  - api tag `inboxes > messages` added
  - api tag `InboxesMessages` removed
  - request body became optional
- **2026-07-15** `394ddcdd9c29`: 7 info
  - added the optional property `code` to the response with the `400` status
  - added the optional property `code` to the response with the `404` status
  - added the optional property `docs` to the response with the `400` status
  - added the optional property `docs` to the response with the `404` status
  - added the optional property `fix` to the response with the `400` status
  - added the optional property `fix` to the response with the `404` status
  - added the optional property `message` to the response with the `400` status
- **2026-03-31** `5b7e1869efdc`: 2 info
  - request property `add_labels` list-of-types was widened by adding types `string` to media type `application/json`
  - request property `remove_labels` list-of-types was widened by adding types `string` to media type `application/json`
- **2026-03-31** `27965096e618`: 8 breaking, 13 warning
  - removed the required property `created_at` from the response with the `200` status
  - removed the required property `from` from the response with the `200` status
  - removed the required property `inbox_id` from the response with the `200` status
  - removed the required property `size` from the response with the `200` status
  - removed the required property `thread_id` from the response with the `200` status
  - removed the required property `timestamp` from the response with the `200` status
  - removed the required property `to` from the response with the `200` status
  - removed the required property `updated_at` from the response with the `200` status
  - removed the optional property `attachments` from the response with the `200` status
  - removed the optional property `bcc` from the response with the `200` status
  - removed the optional property `cc` from the response with the `200` status
  - removed the optional property `extracted_html` from the response with the `200` status
  - removed the optional property `extracted_text` from the response with the `200` status
  - removed the optional property `headers` from the response with the `200` status
  - removed the optional property `html` from the response with the `200` status
  - removed the optional property `in_reply_to` from the response with the `200` status
  - removed the optional property `preview` from the response with the `200` status
  - removed the optional property `references` from the response with the `200` status
  - removed the optional property `reply_to` from the response with the `200` status
  - removed the optional property `subject` from the response with the `200` status
  - removed the optional property `text` from the response with the `200` status

---

[Operation](https://skmtc.dev/agentmail-to/apis/api/docs/v0/inboxes/:inbox_id/messages/:message_id/patch.md) - [API](https://skmtc.dev/agentmail-to/apis/api.md) - [Page](https://skmtc.dev/agentmail-to/apis/api/changes/v0/inboxes/:inbox_id/messages/:message_id/patch)