Context7

Upstash's Context7 brings up-to-date, version-specific documentation and code examples for the libraries you use straight into your agent's context. Instead of leaning on old training data or inventing APIs that don't exist, your agent looks up the current docs before it writes code. Add "use context7" to a prompt, or name a library ID such as /vercel/next.js. What you can do with it - Look up current docs and code examples for a library while you code - Mention a version ("Next.js 16") and get the docs for that version - Skip the search step by naming a library ID, like /supabase/supabase - Rank code examples in the language you write in Its two tools - resolve-library-id turns a library name into a Context7 ID and lists its versions - query-docs fetches the docs and code examples for that ID and your question How it connects Upstash hosts the MCP server at https://mcp.context7.com/mcp, with your Context7 API key in an Authorization: Bearer header. Clients that support MCP sign-in, such as ChatGPT's custom MCP servers, can use https://mcp.context7.com/mcp/oauth to sign in with OAuth instead. It also runs locally with npx -y @upstash/context7-mcp --api-key YOUR_API_KEY, installs as a Gemini CLI extension, and comes as Upstash's own Claude Code plugin (claude plugin marketplace add upstash/context7, then claude plugin install context7@context7-marketplace), which signs you in through your browser. npx ctx7 setup signs you in and sets it up for Cursor, Claude Code or OpenCode in one step. Good to know - It only reads documentation; it doesn't change your code or accounts. - An API key from context7.com/dashboard is recommended for higher rate limits, and a free account is enough to start. - Context7's library docs are community-contributed, so check what your agent writes. - The MCP server is open source; the docs index behind it runs on Upstash's servers.

• “Create a Next.js proxy that checks for a valid JWT in cookies and redirects unauthenticated users to /login. use context7”

  1. resolve-library-id
  2. query-docs
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• “Configure a Cloudflare Worker script to cache JSON API responses for five minutes. use context7”

  1. resolve-library-id