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Context7 MCP Server

by NimbleBrainInc
OverviewInspectNewSchemaRelated ServersScore
Python
Remote
MIT License

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
A
license - permissive license
-
quality - not tested

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