Upstash
Context7
Fetches current, version-accurate documentation for thousands of libraries at request time, which cuts down on hallucinated APIs from stale training data. Reach for it whenever the model is writing against a library.
Install
Run this to register the server with Claude Code. The same npx invocation works in other MCP clients.
install
claude mcp add context7 -- npx -y @upstash/context7-mcp