mcp-builder

# MCP Server Building Skill You now have expertise in building MCP (Model Context Protocol) servers. MCP enables Claude to interact with external services through a standardized protocol. ## What is MCP? MCP servers expose: - **Tools**: Functions Claude can call (like API endpoints) - **Resources**: Data Claude can read (like files or database records) - **Prompts**: Pre-built prompt templates ## Quick Start: Python MCP Server ### 1. Project Setup ```bash # Create project mkdir my-mcp-server && cd my-mcp-server python3 -m venv venv && source venv/bin/activate # Install MCP SDK pip install mcp ``` ### 2. Basic Server Template ```python #!/usr/bin/env python3 """my_server.py - A simple MCP server""" from mcp.server import Server from mcp.server.stdio import stdio_server from mcp.types import Tool, TextContent # Create server instance server = Server("my-server") # Define a tool @server.tool() async def hello(name: str) -> str: """Say hello to someone. Args: name: The name to greet """ return f"Hello, {name}!" @server.tool() async def add_numbers(a: int, b: int) -> str: """Add two numbers together. Args: a: First number b: Second number """ return str(a + b) # Run server async def main(): async with stdio_server() as (read, write): await server.run(read, write) if __name__ == "__main__": import asyncio asyncio.run(main()) ``` ### 3. Register with Claude Add to `~/.claude/mcp.json`: ```...