context7
Context7 Platform -- Up-to-date code documentation for LLMs and AI code editors
The Lens
By Erik Loyd, SaaS CEO and former COO/CFO of an AWS Premier Partner.
Updated Aug 2026
Context7 pulls current library documentation into your coding agent so it stops inventing API signatures from two-year-old training data. It covers a wide range of popular libraries, pre-chunked for LLM consumption, so the agent gets the relevant section instead of an entire documentation site.
Setup changed this summer. Running the ctx7 setup command handles OAuth, generates an API key, and installs either the CLI-plus-Skills path or classic MCP mode, with flags to target Cursor, Claude, or opencode. Manual configuration against the hosted server with a bearer token still works. It runs without a key, but you share a rate limit with everyone else who skipped that step, and the key is free.
Maintained by Upstash, MIT licensed, and the server costs nothing. Install it. The catch is coverage: Context7 can only serve what it has indexed, so a brand-new or obscure library leaves your agent guessing exactly like before.
Free vs Self-Hosted vs Paid
fully freeFree Tier
The MCP server and the ctx7 CLI are MIT licensed and free. The hosted documentation service is free to query, with a free API key available from the Context7 dashboard for higher rate limits.
Self-Hosted
Not the normal path. The value is Upstash's indexed and chunked documentation corpus, which is served from their infrastructure. You run only the local client or point your MCP client at the hosted endpoint.
Paid
No paid tier for the connector. Context7 lists an Enterprise option on its site for organizations that want their own private documentation indexed, priced on request.
Free, but run the ctx7 setup and take the free API key. Without one you share a rate limit with every anonymous user.
What to do by team size
- Solo
- free
- Small team
- free
- Medium team
- free; give each developer their own API key
- Large team
- free; talk to Upstash if you want internal docs indexed
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