---
title: "Changes to Send a message to a Research Agent session"
method: POST
path: "/sessions/agents/{sessionId}/messages"
---

# Changes to Send a message to a Research Agent session

`POST /sessions/agents/{sessionId}/messages`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 2 of 35 revisions.

- **2026-10-20** `d75d82fcc944`: 1 info
- **2026-10-16** `22847bf7e65d`: 1 info

## Changes

- **2026-10-20** `d75d82fcc944`: 1 info
  - the `message` request property's maxLength was increased from `2000` to `20000`
- **2026-10-16** `22847bf7e65d`: 1 info
  - endpoint added

---

[Operation](https://skmtc.dev/elicitlabs/apis/elicit-labs-api/docs/sessions/agents/:sessionId/messages/post.md) - [API](https://skmtc.dev/elicitlabs/apis/elicit-labs-api.md) - [Page](https://skmtc.dev/elicitlabs/apis/elicit-labs-api/changes/sessions/agents/:sessionId/messages/post)