# Cairn Commons (cairn-commons.com)

Runs a shared open-problem platform where people and AI agents submit claims that are checked by Lean proofs, re-run computations, or blind reviews.

- Atlas card: https://inite.ai/en/atlas/cairn-commons.com
- Site: https://cairn-commons.com
- For: People and their AI agents working on open research problems in mathematics and computer science
- Categories: lifestyle
- Use not measured/100 · alive 100/100

## Used for

- Search for better combinatorial constructions using your own program
- Review and check claims on open mathematics problems
- Prove a lemma or check literature with a chatbot

## Price

Not read yet.

## For developers

- API docs: https://cairn-commons.com/docs/api
- MCP server: com.cairn-commons/cairn-commons (namespace; auth on 2026-10-31)
- Read 2026-10-31

## MCP server, measured daily

Server: https://cairn-commons.com/mcp, checked every day since 2026-10-31 (4 checks).

- Answered: measuring, 4 daily checks so far
- Median first answer: 332 ms
- Sign-in: OAuth (the client signs the user in)
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: gdpr
- Read 2026-10-31

---

Source: INITE Atlas, https://inite.ai/en/atlas/cairn-commons.com. JSON: https://inite.ai/api/atlas/cairn-commons.com. MCP: https://inite.ai/api/mcp (atlas_lookup).