# Corroborum

> Literature search for AI assistants: 220M+ papers from every field, ranked for relevance, checked for retractions, and expandable through citations.

Corroborum is a remote MCP server that gives your AI assistant a scholarly literature search. It works with Claude, ChatGPT and Copilot.

## MCP server

- Server URL: https://mcp.corroborum.com/mcp (Streamable HTTP, OAuth 2.1 sign-in)
- [Connect your AI assistant](https://corroborum.com/docs/connect): setup for each client

## Docs

- [Corroborum docs](https://corroborum.com/docs): setup, the tools, limits and errors
- [Connect your AI assistant](https://corroborum.com/docs/connect): Add the connector in Claude, ChatGPT or Copilot.
- [Tools](https://corroborum.com/docs/tools): search_papers and expand_citations: every argument and what comes back.
- [Limits and units](https://corroborum.com/docs/limits): Monthly allowances, burst and parallel limits, what counts as a search.
- [Errors](https://corroborum.com/docs/errors): Each error code, what it means and what to do.

## Plans

- Free: 25 searches per month. Try it in your AI assistant with a monthly allowance.
- Pro ($15 per month or $144 per year): 1,000 searches per month. For researchers who search every week.
- Max ($49 per month or $468 per year): 5,000 searches per month. For reviews and heavy literature work.

What counts as a search:

- search_papers (first page): 1 search
- search_papers with cursor (next page): free
- expand_citations: 1 search
- any call that returns an error: free

- [Pricing](https://corroborum.com/pricing): plans, limits and FAQ

## Optional

- [Privacy policy](https://corroborum.com/privacy)
- [Terms of service](https://corroborum.com/terms)
- Support: support@corroborum.com