---
title: "Chat Message Multipaper"
method: POST
path: "/api/message/chat/everything"
---

# Chat Message Multipaper

`POST /api/message/chat/everything`

## Request

- Base URL: `https://api.openpaper.ai` (the document declares no server; this is the origin it was published from)
- URL: `https://api.openpaper.ai/api/message/chat/everything`
- Auth: API key in header `Authorization`

Send a chat message and stream the response from the LLM.

This searches over the entire corpus of papers and returns a response based on the user's query.
The response includes both the content and any relevant evidence gathered.

## Request body

- MultiPaperChatRequest
  - `conversation_id` string, required
  - `user_query` string, required
  - `user_references` string[], nullable
  - `llm_provider` 'gemini' | 'openai' | 'anthropic'
  - `project_id` string, nullable
  - `mentioned_paper_ids` string[], nullable
  - `mentioned_project_ids` string[], nullable
  - `mentioned_highlight_ids` string[], nullable

## Response `200`

Successful Response

- unknown

## Other responses

- `422`: Validation Error

---

[API](https://skmtc.dev/openpaper/apis/open-paper.md) - [All operations](https://skmtc.dev/openpaper/apis/open-paper/llms.txt) - [OpenAPI document](https://skmtc.dev/openpaper/apis/open-paper/revisions/c2ad03216101?raw)