Context7
Up-to-date library docs for AI agents.
Upstash · open source · checked Oct 22, 2026
What it is
Context7 (by Upstash) feeds current, version-specific library documentation into agents via MCP or CLI (npx ctx7 setup), reducing hallucinated APIs.
Use cases
- →Stopping agents from using outdated APIs
- →Fast-moving frameworks
- →Any MCP-capable editor
Pros
- +Big quality boost for fast-moving libraries
- +Easy setup
- +Works across agents
Cons
- −Doc coverage varies by library
- −Paid limits unclear
Where it ranks
- #3 Best MCP Servers for Builders
Up-to-date library docs stop agents from hallucinating old APIs.
FAQ
How much does Context7 cost?
Open-source MCP server; hosted API with keys. Check pricing for paid tiers. (As checked on 2026-10-22; confirm on https://context7.com/pricing.)
What is Context7 best for?
#3 in Best MCP Servers for Builders: Fast-moving frameworks.
What are the best alternatives to Context7?
GitHub MCP Server (GitHub's official MCP server for agents); Playwright MCP (Let agents drive a real browser).
Is Context7 open source?
Yes, Context7 is open source (or has an open-source core).