---
title: "Changes to Send one agent Playground message"
method: POST
path: "/chat-sessions/messages"
---

# Changes to Send one agent Playground message

`POST /chat-sessions/messages`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 6 of 138 revisions.

- **2026-10-26** `abec02af60a4`: 1 info
- **2026-10-04** `c9e609871357`: 1 info
- **2026-09-10** `b4b7857c1379`: 3 info
- **2026-09-02** `908e54dd53d8`: 3 info
- **2026-08-26** `9b2992990271`: 1 info
- **2026-08-24** `d8964f1ecc61`: 1 info

## Changes

- **2026-10-26** `abec02af60a4`: 1 info
  - added the optional property `skippedServers` to the response with the `200` status
- **2026-10-04** `c9e609871357`: 1 info
  - added the new optional request property `reasoningEffort`
- **2026-09-10** `b4b7857c1379`: 3 info
  - added the new optional request property `browser`
  - added the optional property `browser` to the response with the `200` status
  - added the optional property `chatSessionId` to the response with the `200` status
- **2026-09-02** `908e54dd53d8`: 3 info
  - added the new optional request property `hostId`
  - added the optional property `engine` to the response with the `200` status
  - added the optional property `hostId` to the response with the `200` status
- **2026-08-26** `9b2992990271`: 1 info
  - added the required property `projectId` to the response with the `200` status
- **2026-08-24** `d8964f1ecc61`: 1 info
  - endpoint added

---

[Operation](https://skmtc.dev/mcpjam/apis/mcpjam-api/docs/chat-sessions/messages/post.md) - [API](https://skmtc.dev/mcpjam/apis/mcpjam-api.md) - [Page](https://skmtc.dev/mcpjam/apis/mcpjam-api/changes/chat-sessions/messages/post)