This guide provides the quick setup procedure for adding the Context7 MCP (Model Context Protocol) server to the OpenAI Codex programming agent. Context7 enables the agent to access real-time, up-to-date documentation for libraries and frameworks (e.g., Next.js 15, Tailwind v4, Supabase), preventing AI hallucinations.

Run the following command in your terminal (WSL2/Linux/macOS) to automatically register the server:

codex mcp add context7 npx -y @upstash/context7-mcp

If you have a free API Key from Context7 for higher rate limits, use the following version:

codex mcp add context7 npx -y @upstash/context7-mcp --env CONTEXT7_API_KEY=your_api_key_here

To confirm that the server is active and recognized by Codex, use the list command:

codex mcp list

Once installed, you can trigger the documentation search directly in your interactive Codex prompt using the keyword “use context7”.

Prompt Examples:

• How do I set up a middleware in Next.js 15? use context7
• Show me a Stripe Checkout integration example. use context7
• Refactor this component using Tailwind v4 standards. use context7