---
title: "Send Session Message"
method: POST
path: "/session/{session_id}/chat"
tags: ["session"]
---

# Send Session Message

`POST /session/{session_id}/chat`

POST a user message to the session's conversation_history.
Reuses the same approach from conversation_service -> append_message(...).

## Path parameters

- `session_id` string, required

## Request body

- SessionChatRequest — Minimal request body to handle user chat messages specifically for the session. Using the same approach as your conversation system.
  - `message` string, required
  - `type` 'text' | 'image_url' | 'image_description'

## Response `200`

Successful Response

- RoutersUsSessionBasicResponse — Simple status+message response.
  - `status` string, required
  - `message` string, required

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/excellence-ai/apis/excellence-learning.md) · [All operations](https://skmtc.dev/excellence-ai/apis/excellence-learning/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/excellence-ai/excellence-learning/revisions/8d495ed916c6/schema)