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Context7 MCP Server

by NimbleBrainInc
GitHub
Python
MIT License
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Context7 MCP Server

MCP server providing access to Context7 API for up-to-date code documentation retrieval.

Features

Core Capabilities

  • Documentation Search - Search across thousands of libraries and frameworks

  • Code Examples - Get working code examples for specific use cases

  • API Reference - Detailed API documentation for functions and classes

  • Code Explanation - Understand code with line-by-line explanations

  • Troubleshooting - Get help with error messages and bugs

  • Best Practices - Learn recommended patterns and anti-patterns

  • Migration Guides - Upgrade between versions or switch libraries

  • Library Comparison - Compare different libraries for your use case

  • Changelog Access - View release notes and breaking changes

Installation

  1. Clone this repository

  2. Install dependencies:

pip install -r requirements.txt

  1. Set up your environment variables:

cp .env.example .env # Edit .env and add your Context7 API key

Configuration

Get Your Context7 API Key

  1. Go to https://context7.com/api

  2. Sign up or sign in

  3. Generate an API key

  4. Copy the key and add it to your .env file

Claude Desktop Configuration

{ "mcpServers": { "context7": { "command": "fastmcp", "args": ["run", "server.py"], "env": { "CONTEXT7_API_KEY": "your_api_key_here" } } } }

Available Tools

search_documentation

Search for documentation across supported libraries.

Parameters:

  • query (required): Search query

  • language: Filter by language (javascript, python, go, etc.)

  • framework: Filter by framework (react, django, nextjs, etc.)

  • limit: Max results (default: 10, max: 50)

Example:

{ "query": "how to use useState in React", "framework": "react", "limit": 5 }

get_library_docs

Get documentation for a specific library.

Parameters:

  • library (required): Library name

  • version: Specific version (default: latest)

  • topic: Specific topic or module

Example:

{ "library": "react", "version": "18.2.0", "topic": "hooks" }

get_code_examples

Get code examples for a specific use case.

Parameters:

  • library (required): Library name

  • use_case (required): What you're trying to accomplish

  • language: Programming language

Example:

{ "library": "express", "use_case": "JWT authentication middleware" }

explain_code

Get explanation of code with documentation references.

Parameters:

  • code (required): Code snippet to explain

  • language: Programming language (auto-detected)

  • context: Additional context

Example:

{ "code": "const [count, setCount] = useState(0);", "language": "javascript", "context": "React component" }

get_api_reference

Get detailed API reference for a function or class.

Parameters:

  • library (required): Library name

  • api_name (required): API/function/class name

  • version: Library version (default: latest)

Example:

{ "library": "react", "api_name": "useState", "version": "18.2.0" }

compare_libraries

Compare multiple libraries for a use case.

Parameters:

  • libraries (required): List of library names

  • use_case (required): What you're building

  • language: Programming language

Example:

{ "libraries": ["react", "vue", "svelte"], "use_case": "building a todo app" }

get_migration_guide

Get migration guide between libraries or versions.

Parameters:

  • from_library (required): Current library

  • to_library (required): Target library

  • from_version: Current version

  • to_version: Target version

Example:

{ "from_library": "react", "to_library": "react", "from_version": "17.0.0", "to_version": "18.0.0" }

get_best_practices

Get best practices for a library.

Parameters:

  • library (required): Library name

  • topic: Specific topic (performance, security, testing, etc.)

Example:

{ "library": "react", "topic": "performance" }

troubleshoot_error

Get help with error messages.

Parameters:

  • error_message (required): The error you're seeing

  • library: Library where error occurred

  • code_context: Code causing the error

Example:

{ "error_message": "Cannot read property 'map' of undefined", "library": "react", "code_context": "data.map(item => <div>{item}</div>)" }

list_supported_libraries

List all supported libraries.

Parameters:

  • language: Filter by language

  • category: Filter by category

Example:

{ "language": "python", "category": "data-science" }

get_changelog

Get changelog and release notes.

Parameters:

  • library (required): Library name

  • from_version: Starting version

  • to_version: Ending version (default: latest)

Example:

{ "library": "react", "from_version": "17.0.0", "to_version": "18.2.0" }

Usage Examples

Search for Documentation

{ "tool": "search_documentation", "query": "authentication with JWT", "language": "javascript" }

Get Code Examples

{ "tool": "get_code_examples", "library": "pandas", "use_case": "filter dataframe by multiple conditions" }

Explain Complex Code

{ "tool": "explain_code", "code": "useEffect(() => { fetchData(); }, [id]);", "language": "javascript" }

Compare Frameworks

{ "tool": "compare_libraries", "libraries": ["express", "fastify", "koa"], "use_case": "REST API server" }

Troubleshoot an Error

{ "tool": "troubleshoot_error", "error_message": "Module not found: Can't resolve 'react'", "library": "react" }

Migration Help

{ "tool": "get_migration_guide", "from_library": "webpack", "to_library": "vite" }

Supported Languages & Frameworks

Context7 supports documentation for:

Languages

  • JavaScript/TypeScript

  • Python

  • Go

  • Rust

  • Java

  • C#

  • PHP

  • Ruby

  • Swift

  • Kotlin

Popular Frameworks

  • Web: React, Vue, Angular, Svelte, Next.js, Nuxt

  • Backend: Express, Django, FastAPI, Spring Boot, Rails

  • Mobile: React Native, Flutter, SwiftUI

  • Data Science: Pandas, NumPy, Scikit-learn, TensorFlow

  • DevOps: Docker, Kubernetes, Terraform, Ansible

Use Cases

For Developers

  • Quick documentation lookup while coding

  • Find working code examples

  • Understand unfamiliar code

  • Troubleshoot errors faster

  • Learn best practices

For AI Agents

  • Provide accurate, up-to-date documentation

  • Generate code with proper library usage

  • Help debug issues with context

  • Recommend appropriate libraries

  • Assist with migrations and upgrades

Error Handling

The server handles:

  • Invalid API keys

  • Rate limiting

  • Network timeouts

  • Invalid library names

  • Malformed queries

Rate Limits

Context7 API rate limits depend on your plan:

  • Free tier: 100 requests/day

  • Pro tier: 10,000 requests/day

  • Enterprise: Custom limits

Check your usage at: https://context7.com/dashboard

Best Practices

  1. Be Specific: Include library names and versions when possible

  2. Use Filters: Narrow searches with language/framework filters

  3. Cache Results: Store frequently accessed documentation

  4. Combine Tools: Use search + get_api_reference for comprehensive info

  5. Error Context: Provide code context for better troubleshooting

Security Notes

  • Never commit API keys to version control

  • Use environment variables

  • Rotate keys regularly

  • Monitor usage in dashboard

  • Set up usage alerts

Troubleshooting

"Invalid API Key" Error

  • Verify key in .env file

  • Check key is active at context7.com

  • Ensure no extra spaces

Rate Limit Errors

  • Check current usage in dashboard

  • Upgrade plan if needed

  • Implement caching

Library Not Found

  • Check library name spelling

  • Use list_supported_libraries to verify

  • Some libraries may not be indexed yet

Resources

License

MIT License - feel free to use in your projects!

This server cannot be installed

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security - not tested
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license - not tested
-
quality - not tested

How are these scores calculated?

remote-capable server

The server can be hosted and run remotely because it primarily relies on remote services or has no dependency on the local environment.

Provides access to the Context7 API for searching up-to-date documentation, code examples, API references, and troubleshooting help across thousands of programming libraries and frameworks. Enables developers and AI agents to quickly find accurate documentation, compare libraries, get migration guides, and resolve coding issues.

  1. Features
    1. Core Capabilities
  2. Installation
    1. Configuration
      1. Get Your Context7 API Key
      2. Claude Desktop Configuration
    2. Available Tools
      1. search_documentation
      2. get_library_docs
      3. get_code_examples
      4. explain_code
      5. get_api_reference
      6. compare_libraries
      7. get_migration_guide
      8. get_best_practices
      9. troubleshoot_error
      10. list_supported_libraries
      11. get_changelog
    3. Usage Examples
      1. Search for Documentation
      2. Get Code Examples
      3. Explain Complex Code
      4. Compare Frameworks
      5. Troubleshoot an Error
      6. Migration Help
    4. Supported Languages & Frameworks
      1. Languages
      2. Popular Frameworks
    5. Use Cases
      1. For Developers
      2. For AI Agents
    6. Error Handling
      1. Rate Limits
        1. Best Practices
          1. Security Notes
            1. Troubleshooting
              1. "Invalid API Key" Error
              2. Rate Limit Errors
              3. Library Not Found
            2. Resources
              1. License

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