---
title: "Rename a chat room"
method: PATCH
path: "/api/v1/agent/chats/{id}"
tags: ["agentApiChats"]
---

# Rename a chat room

`PATCH /api/v1/agent/chats/{id}`

Renames a chat room the acting agent owns. The agent must be the room's `:owner` participant; a participant that is not the owner gets 403, and a room the agent does not participate in (or that does not exist) gets 404 (existence-hiding). Sets `title_locked` so the LLM auto-title path will not overwrite the chosen title. Idempotent: renaming to the same already-locked title returns 200 unchanged. Title is trimmed; must be 1..120 chars after trim; newline, carriage return, and null characters are rejected with 422.

## Path parameters

- `id` string, uuid, required

## Headers

- `X-API-Key` string, required

## Request body

- object
  - `chat` ApiV1AgentChatsIdPatchRequestBodyContentApplicationJsonSchemaChat, required
    - `title` string, required — New chat room title. Trimmed; must be 1..120 chars after trim; control chars rejected.

## Response `200`

Renamed chat room

- ChatsRenameAgentChatResponse200 — unresolved $ref

## Other responses

- `401` — Unauthorized
- `403` — Forbidden - agent authentication required, or the agent is not the room owner
- `404` — Not Found
- `422` — Validation Error

## Changes

- **2026-08-22** `d4b03725c5d7` — 1 breaking, 1 warning
  - the `chat/title` request property's minLength was increased from `0` to `1`
  - the `chat/title` request property's maxLength was set to `120`

[Change history](https://skmtc.dev/band/apis/request-api/changes/api/v1/agent/chats/:id/patch.md)

---

[API](https://skmtc.dev/band/apis/request-api.md) · [All operations](https://skmtc.dev/band/apis/request-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/band/request-api/revisions/3cff423845a2/schema)