---
title: "Send Message"
method: POST
path: "/users/me/conversations/{conversation_id}/completion"
tags: ["conversations"]
---

# Send Message

`POST /users/me/conversations/{conversation_id}/completion`

Send a message to a conversation.

- stream=true (default): Returns a streaming response with SSE
- stream=false: Returns a complete Conversation object with the response

## Path parameters

- `conversation_id` string, required

## Query parameters

- `stream` boolean — Whether to stream the response

## Request body

- CompletionRequest — Send message to existing conversation
  - `prompt` string, required
  - `parent_message_uuid` string, nullable
  - `attachments` FileAttachment[]
    - `filename` string, required
    - `content_type` string, required
    - `file_key` string, nullable
    - `asset_id` string, nullable
    - `thumbnail_key` string, nullable
    - `display_name` string, nullable
    - `base64_content` string, nullable
    - `file_size` integer, nullable
    - `description` string, nullable
    - `text_content` string, nullable
    - `metadata` object, nullable
  - `provider` string

## Response `200`

Successful Response

- unknown

## Other responses

- `401` — Unauthorized
- `403` — Forbidden
- `409` — Conflict
- `422` — Validation Error
- `500` — Internal server error

---

[API](https://skmtc.net/adapter/apis/adapter-api.md) · [All operations](https://skmtc.net/adapter/apis/adapter-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/adapter/adapter-api/versions/ab13bbbbd391/schema)