Context7 solves a common problem with AI coding assistants: outdated training data and hallucinated APIs. Instead of relying on stale knowledge, Context7 fetches current documentation directly from source repositories.

What's Included

This plugin provides:

MCP Server - Connects Claude Code to Context7's documentation service
Skills - Auto-triggers documentation lookups when you ask about libraries
Agents - A dedicated docs-researcher agent for focused lookups
Commands - /context7:docs for manual documentation queries

Installation

Add the marketplace and install the plugin:

claude plugin marketplace add upstash/context7
claude plugin install context7@context7-marketplace

API Key (Recommended)

Without an API key, the plugin connects anonymously and shares the anonymous rate limits. To use your own plan, create an API key in the Context7 dashboard and export it as an environment variable before launching Claude Code:

# e.g. in ~/.zshrc or ~/.bashrc
export CONTEXT7_API_KEY="your-api-key"

The plugin's MCP server configuration picks up CONTEXT7_API_KEY automatically. Restart Claude Code after setting it, then verify the key is being used by checking your usage in the dashboard.

Available Tools

resolve-library-id

Searches for libraries and returns Context7-compatible identifiers.

Input: "next.js"
Output: { id: "/vercel/next.js", name: "Next.js", versions: ["v15.1.8", "v14.2.0", ...] }

query-docs

Fetches documentation for a specific library, ranked by relevance to your question.

Input: { libraryId: "/vercel/next.js", query: "app router middleware" }
Output: Relevant documentation snippets with code examples

Usage Examples

The plugin works automatically when you ask about libraries:

"How do I set up authentication in Next.js 15?"
"Show me React Server Components examples"
"What's the Prisma syntax for relations?"

For manual lookups, use the command:

/context7:docs next.js app router
/context7:docs /vercel/next.js/v15.1.8 middleware

Or spawn the docs-researcher agent when you want to keep your main context clean:

spawn docs-researcher to look up Supabase auth methods

Version Pinning

To get documentation for a specific version, include the version in the library ID:

/vercel/next.js/v15.1.8
/supabase/supabase/v2.45.0

The resolve-library-id tool returns available versions, so you can pick the one that matches your project.