MCP Server

SDKs, frameworks, tutorials and debugging tools for building MCP servers. They are not included in the MCP server leaderboard.

PrefectHQ/fastmcp28k

fastmcp

🚀 The fast, Pythonic way to build MCP servers and clients.

AI & agents

Official

modelcontextprotocol/python-sdk25k

python-sdk

The official Python SDK for Model Context Protocol servers and clients

AI & agents

Official

microsoft/mcp-for-beginners17k

This open-source curriculum introduces the fundamentals of Model Context Protocol (MCP) through real-world, cross-language examples in .NET, Java, TypeScript, JavaScript, Rust and Python. Designed for developers, it focuses on practical techniques for building modular, scalable, and secure AI workflows from session setup to service orchestration.

Security

Official

modelcontextprotocol/typescript-sdk14k

typescript-sdk

The official TypeScript SDK for Model Context Protocol servers and clients

AI & agents

mcp-use/mcp-use11k

mcp-use

The fullstack MCP framework to develop MCP Apps for ChatGPT / Claude & MCP Servers for AI Agents.

Frontend

Official

modelcontextprotocol/csharp-sdk4.6k

csharp-sdk

The official C# SDK for Model Context Protocol servers and clients. Maintained in collaboration with Microsoft.

AI & agents

Official

modelcontextprotocol/java-sdk3.7k

java-sdk

The official Java SDK for Model Context Protocol servers and clients. Maintained in collaboration with Spring AI

AI & agents

nitrocloudofficial/nitrostack2.5k

nitrostack

The full-stack TypeScript framework to build, test, and deploy production-ready MCP servers and AI-native apps.

Testing

MCPJam/inspector2.2k

inspector

Testing and evaluation platform to chat, inspect, and debug MCP servers, MCP apps, and ChatGPT apps.

Testing

Official

modelcontextprotocol/php-sdk1.6k

php-sdk

The official PHP SDK for Model Context Protocol servers and clients. Maintained in collaboration with The PHP Foundation.

AI & agents

ArcadeAI/arcade-mcp1k

arcade-mcp

MCP Server Framework and Tool Development library for building custom capabilities into agents.

AI & agents

Official

modelcontextprotocol/ruby-sdk921

ruby-sdk

The official Ruby SDK for the Model Context Protocol servers and clients.

AI & agents

golf-mcp/golf840

golf

Production-Ready MCP Server Framework • Build, deploy & scale secure AI agent infrastructure • Includes Auth, Observability, Debugger, Telemetry & Runtime • Run real-world MCPs powering AI Agents

DevOps & cloud