---
title: "Changes to Messages (Anthropic-compatible)"
method: POST
path: "/v1/messages"
---

# Changes to Messages (Anthropic-compatible)

`POST /v1/messages`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 54 revisions.

- **2026-10-25** `2534b8ba042e`: 1 breaking, 12 info
- **2026-10-22** `90470f3738e6`: 1 info

## Changes

- **2026-10-25** `2534b8ba042e`: 1 breaking, 12 info
  - the response's body type changed from no type to `object` for status `200`
  - added the non-success response with the status `400`
  - added the non-success response with the status `402`
  - added the non-success response with the status `404`
  - added the non-success response with the status `429`
  - added the optional property `role` to the response with the `200` status
  - added the optional property `stop_sequence` to the response with the `200` status
  - added the optional property `type` to the response with the `200` status
  - added the required property `content` to the response with the `200` status
  - added the required property `id` to the response with the `200` status
  - added the required property `model` to the response with the `200` status
  - added the required property `stop_reason` to the response with the `200` status
  - added the required property `usage` to the response with the `200` status
- **2026-10-22** `90470f3738e6`: 1 info
  - endpoint added

---

[Operation](https://skmtc.dev/the-swarm-corporation/apis/swarms-api/docs/v1/messages/post.md) - [API](https://skmtc.dev/the-swarm-corporation/apis/swarms-api.md) - [Page](https://skmtc.dev/the-swarm-corporation/apis/swarms-api/changes/v1/messages/post)