context7-cli - Claude MCP Skill

# ctx7 CLI

The Context7 CLI does two things: fetches up-to-date library documentation and sets up Context7 MCP for your editor.

Make sure the CLI is up to date before running commands:

```bash
npm install -g ctx7@latest
```

Or run directly without installing:

```bash
npx ctx7@latest <command>
```

## What this skill covers

- **[Documentation](references/docs.md)** — Fetch current docs for any library. Use when writing code, verifying API signatures, or when training data may be outdated.
- **[Setup](references/setup.md)** — Configure Context7 MCP for Claude Code / Cursor / OpenCode.

## Quick Reference

```bash
# Documentation
ctx7 search <query>                   # Search all libraries in one step
ctx7 library <name> <query>           # Step 1: resolve library ID
ctx7 docs <libraryId> <query>         # Step 2: fetch docs

# Setup
ctx7 setup                            # Configure Context7 MCP (interactive)
ctx7 login                            # Log in for higher rate limits
ctx7 whoami                           # Check current login status
```

## Authentication

```bash
ctx7 login               # Opens browser for OAuth
ctx7 login --no-browser  # Prints URL instead of opening browser
ctx7 logout              # Clear stored tokens
ctx7 whoami              # Show current login status (name + email)
```

Most commands work without login. Exception: `ctx7 setup` requires it unless `--api-key` or `--oauth` is passed. Login also unlocks higher rate limits on docs commands.

Set an API key via environment variable to skip interactive login entirely:

```bash
export CONTEXT7_API_KEY=your_key
```

## Common Mistakes

- Library IDs require a `/` prefix — `/facebook/react` not `facebook/react`
- Always run `ctx7 library` first — `ctx7 docs react "hooks"` will fail without a valid ID