Context7
By Upstash
MIT-licensed documentation layer from Upstash, around 62,000 GitHub stars and roughly 1.1 million weekly installs of its MCP server, that pulls version-specific docs and code examples from the source library into a coding agent at prompt time so the model answers from current APIs instead of year-old training data, installed either as an MCP server or as a ctx7 CLI skill for Cursor, Claude Code, and OpenCode.
Best for
- stopping an agent from inventing library APIs that do not exist
- pinning generated code to a specific library version
- current docs inside Cursor, Claude Code, or OpenCode without tab-switching
- indexing a private repository alongside public documentation
- one documentation source shared across several agents
- Sep 16, 2026Added to the coding category: Upstash documentation layer, roughly 62,000 GitHub stars and about 1.1 million weekly installs of @upstash/context7-mcp, that retrieves version-specific library docs into an agent context at prompt time over MCP or the ctx7 CLI skill. Different job from Graft and Graphify in the catalogue, which map your own repository; Context7 indexes third-party library documentation.
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