How to use MCP with Claude Code

pip install mcp anthropic>=0.20

import os
from anthropic import Anthropic
from mcp.server.stdio import stdio_server
from mcp.server import Server

# Initialize the Anthropic client with your Claude API key
client = Anthropic(api_key=os.environ["ANTHROPIC_API_KEY"])

# Define a simple MCP server class
class ClaudeMCPServer(Server):
    def __init__(self):
        super().__init__()

    async def handle_request(self, request):
        # Example: Echo back the request content
        response = {
            "result": f"Received: {request.get('input', '')}"
        }
        return response

# Run the MCP stdio server with the ClaudeMCPServer instance
if __name__ == "__main__":
    server = ClaudeMCPServer()
    stdio_server(server)

import asyncio

# Example async handler variation
class AsyncClaudeMCPServer(Server):
    async def handle_request(self, request):
        # Simulate async processing
        await asyncio.sleep(0.1)
        return {"result": f"Async received: {request.get('input', '')}"}

# Usage remains the same with stdio_server