upstash/context7

What it is

Context7 pulls up-to-date, version-specific documentation and code examples straight from the source and places them directly into your prompt. This is meant to avoid outdated code, hallucinated APIs and generic answers for old package versions. It works in two modes: CLI + Skills (a skill guides the agent to use ctx7 CLI commands, no MCP required) or MCP (a Context7 MCP server the agent calls natively).

Who it's for

• Developers using AI coding agents or editors (e.g. Cursor, Claude Code, OpenCode) who want current library documentation in their prompts
• Teams hitting outdated or hallucinated API output from LLMs
• Library authors who want their docs available through Context7 (via the Adding Libraries guide)

Requirements

Setup

1. Run the one-command setup

   Authenticates via OAuth, generates an API key, and installs the appropriate skill. You can choose between CLI + Skills or MCP mode. Use --cursor, --claude, or --opencode to target a specific agent.

   bashCopy

   npx ctx7 setup

2. Remove the generated setup

   To remove the setup later, run this command. If you globally installed the CLI with npm install -g ctx7, remove that package separately with npm uninstall -g ctx7.

   bashCopy

   npx ctx7 remove

3. Manual MCP configuration

   Use the Context7 server URL https://mcp.context7.com/mcp with your MCP client and pass your API key via the Authorization: Bearer YOUR_API_KEY header. Client-specific instructions are at https://context7.com/docs/resources/all-clients.

Examples

Create a Next.js middleware that checks for a valid JWT in cookies
and redirects unauthenticated users to `/login`. use context7

Implement basic authentication with Supabase. use library /supabase/supabase for API and docs.

How do I set up Next.js 14 middleware? use context7

Always use Context7 when I need library/API documentation, code generation, setup or configuration steps without me having to explicitly ask.

Pros & cons

Images