---
title: "Open an independent launch-scoped side chat"
method: POST
path: "/api/v1/sessions/{sessionId}/conversation/side-chats"
tags: ["conversations"]
---

# Open an independent launch-scoped side chat

`POST /api/v1/sessions/{sessionId}/conversation/side-chats`

## Request

- Base URL: `http://127.0.0.1:3001`
- URL: `http://127.0.0.1:3001/api/v1/sessions/{sessionId}/conversation/side-chats`
- Auth: none declared

## Path parameters

- `sessionId` string, required: Session identifier, e.g. project-1.

## Request body

- CreateConversationSideChatRequest
  - `forceNew` boolean
  - `idempotencyKey` string, required
  - `label` string
  - `reference` ConversationExcerptReferenceRequest
    - `conversationId` string, required
    - `messageId` string, required
    - `revision` integer, required
    - `text` string, required

## Response `201`

Created

- CreateConversationSideChatResponse
  - `side` SideConversation, required
    - `anchorTurnId` string
    - `cleanupPending` boolean
    - `contextMode` string, required
    - `createdAt` string, date-time, required
    - `effort` string
    - `errorMessage` string
    - `hasWork` boolean, required
    - `id` string, required
    - `label` string, required
    - `mainConversationId` string, required
    - `manualLabel` boolean
    - `model` string
    - `recreateRequired` boolean
    - `selectedText` string
    - `sessionId` string, required
    - `sourceMessageId` string
    - `sourceRevision` integer
    - `state` string, required
    - `updatedAt` string, date-time, required

## Other responses

- `404`: Not Found
- `409`: Conflict
- `500`: Internal Server Error
- `501`: Not Implemented

## Changes

- **2026-10-21** `8f160e6183cd`: 4 info
  - removed the `agent_switch_saga` enum value from the `reporting_owner` response property for the response status `404`
  - removed the `agent_switch_saga` enum value from the `reporting_owner` response property for the response status `409`
  - removed the `agent_switch_saga` enum value from the `reporting_owner` response property for the response status `500`
  - removed the `agent_switch_saga` enum value from the `reporting_owner` response property for the response status `501`
- **2026-10-11** `8d90261df99e`: 1 info
  - endpoint added

[Operation history](https://skmtc.dev/composiohq/apis/agent-orchestrator-http-daemon/changes/api/v1/sessions/:sessionId/conversation/side-chats/post.md)

---

[API](https://skmtc.dev/composiohq/apis/agent-orchestrator-http-daemon.md) - [All operations](https://skmtc.dev/composiohq/apis/agent-orchestrator-http-daemon/llms.txt) - [OpenAPI document](https://skmtc.dev/composiohq/apis/agent-orchestrator-http-daemon/revisions/61d7efd08578?raw)