---
title: "Create message"
method: POST
path: "/messages"
tags: ["Messages"]
---

# Create message

`POST /messages`

## Request body

- CreateMessageRequest
  - `content` string, required
  - `role` 'user' | 'system' | 'assistant' | 'tool', required
  - `model` string, nullable
  - `provider` string, nullable
  - `sessionId` string, nullable
  - `topicId` string, nullable
  - `threadId` string, nullable
  - `parentId` string, nullable
  - `quotaId` string, nullable
  - `agentId` string, nullable
  - `clientId` string, nullable
  - `metadata` object, nullable
  - `reasoning` object, nullable
  - `search` object, nullable
  - `tools` object, nullable
  - `traceId` string, nullable
  - `observationId` string, nullable
  - `files` string[]
  - `favorite` boolean, nullable

## Response `200`

Created

- ApiResponseMessage
  - `success` boolean, required
  - `message` string, nullable
  - `timestamp` string, date-time, required
  - `data` Message
    - `id` string
    - `content` string, nullable
    - `role` 'user' | 'system' | 'assistant' | 'tool', nullable
    - `sessionId` string, nullable
    - `topicId` string, nullable
    - `parentId` string, nullable
    - `clientId` string, nullable
    - `metadata` object, nullable
    - `reasoning` object, nullable
    - `search` object, nullable
    - `tools` object, nullable
    - `files` string[], nullable
    - `favorite` boolean, nullable
    - `createdAt` string, date-time, nullable
    - `updatedAt` string, date-time, nullable

## Other responses

- `400` — Bad Request
- `401` — Unauthorized
- `403` — Forbidden

---

[API](https://skmtc.net/lobehub/apis/lobechat-openapi.md) · [All operations](https://skmtc.net/lobehub/apis/lobechat-openapi/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/lobehub/lobechat-openapi/versions/7be2ebcf191c/schema)