Fetch Library Documentation from Context7

Fetch real-time, version-specific documentation and code examples for libraries.

When to Use

Use this skill when:

• User needs current API documentation for a library
• You need up-to-date syntax examples (your training data may be outdated)
• User asks "show me how to use X" or "what's the latest syntax for Y"
• Implementing features with a specific library
• Troubleshooting library usage issues

Prerequisites

1. Context7 API key available via CONTEXT7_API_KEY in the environment or a shell startup file such as ~/.bashrc (the bundled scripts can read either)
2. Library ID in owner/repo format (use context7-search first if unknown)

How to Execute

Fetch Code Examples (Default)

bash
python3 ./scripts/fetch_docs.py --library "owner/repo"

Fetch Topic-Focused Documentation

bash
python3 ./scripts/fetch_docs.py --library "owner/repo" --topic "TOPIC"

Fetch Documentation Info (Instead of Code)

bash
python3 ./scripts/fetch_docs.py --library "owner/repo" --type info

Fetch Specific Version

bash
python3 ./scripts/fetch_docs.py --library "owner/repo" --version "v15.1.8"

Parameters

| Parameter | Required | Default | Description | |-----------|----------|---------|-------------| | --library | Yes | - | Library in owner/repo format | | --topic | No | - | Focus on specific feature/topic | | --type | No | code | code for snippets, info for docs | | --version | No | latest | Specific version tag | | --page | No | 1 | Page number for pagination |

Examples

Fetch Next.js Routing Examples

bash
python3 ./scripts/fetch_docs.py \
  --library "vercel/next.js" \
  --topic "routing"

Fetch Prisma PostgreSQL Setup

bash
python3 ./scripts/fetch_docs.py \
  --library "prisma/prisma" \
  --topic "postgresql connection"

Fetch React Hooks Documentation

bash
python3 ./scripts/fetch_docs.py \
  --library "facebook/react" \
  --topic "hooks" \
  --type info

Fetch Specific Version

bash
python3 ./scripts/fetch_docs.py \
  --library "vercel/next.js" \
  --version "v14.3.0" \
  --topic "app router"

Response Format

json
{
  "success": true,
  "data": {
    "library": "vercel/next.js",
    "topic": "routing",
    "type": "code",
    "content": {
      "content": "### Dynamic Route Handler\n\nSource: ...\n\n```typescript\nexport async function GET(...) {...}\n```\n\n---\n\n### Another Example\n..."
    }
  }
}

Common Library IDs

| Library | ID | Common Topics | |---------|-------------|---------------| | Next.js | vercel/next.js | routing, server components, api routes | | React | facebook/react | hooks, state, context, suspense | | Prisma | prisma/prisma | setup, queries, relations, migrations | | Supabase | supabase/supabase | auth, realtime, row level security | | FastAPI | fastapi/fastapi | routing, validation, dependencies | | Express | expressjs/express | middleware, routing, error handling | | Tailwind | tailwindlabs/tailwindcss | configuration, utilities, plugins |

Workflow Examples

Example 1: Unknown Library

User: "How do I set up authentication with Supabase?"

1. Search for library (if ID unknown):
   python3 ./scripts/resolve_library.py --query "supabase"
   → Returns supabase/supabase

2. Fetch focused documentation:
   python3 ./scripts/fetch_docs.py \
     --library "supabase/supabase" \
     --topic "authentication"

Example 2: Known Library

User: "Show me the latest Next.js routing API"

Fetch directly (skip search):
   python3 ./scripts/fetch_docs.py \
     --library "vercel/next.js" \
     --topic "app router"

Error Handling

Library not found (404):

• Use context7-search to find the correct library ID
• Format must be owner/repo (e.g., vercel/next.js)

Topic not matched:

• Try broader topic keywords
• Omit topic entirely to get general documentation

Authentication error:

• Verify CONTEXT7_API_KEY is available in your environment or shell startup file
• Check key is valid

Best Practices

1. Use specific topics - Get focused results with --topic
2. Try code first - Default --type code gives practical examples
3. Use info for concepts - --type info for documentation/explanations
4. Check versions - Use --version for version-specific syntax