Connecting MCP Tools to Claude

The Anthropic Python SDK has beta helpers that convert MCP tools into tools for the tool runner (pip install "anthropic[mcp]"). Your chatbot then gets every tool the server offers, with no extra code per tool.

import asyncio
from anthropic import AsyncAnthropic
from anthropic.lib.tools.mcp import async_mcp_tool
from mcp import ClientSession, StdioServerParameters
from mcp.client.stdio import stdio_client

client = AsyncAnthropic()

async def main():
    params = StdioServerParameters(command="python", args=["shopease_mcp.py"])
    async with stdio_client(params) as (read, write):
        async with ClientSession(read, write) as mcp_client:
            await mcp_client.initialize()
            tools_result = await mcp_client.list_tools()
            runner = client.beta.messages.tool_runner(
                model="claude-opus-5-5",
                max_tokens=4000,
                messages=[{"role": "user", "content": "Is my order SE1077 delivered yet?"}],
                tools=[async_mcp_tool(t, mcp_client) for t in tools_result.tools],
            )
            async for message in runner:
                for block in message.content:
                    if block.type == "text":
                        print(block.text)

asyncio.run(main())

python chat_with_mcp.py

Not yet - your Prestige Pressure Cooker 3L (SE1077) is out for delivery and should reach you today.

• Only install MCP servers you trust. A server runs code on your machine and its tool descriptions go into the model's context (a malicious server can hide instructions there: "tool poisoning").
• Give each server the least privilege it needs: a read-only database user, scoped API tokens.
• Keep secrets in environment variables of the server, never in tool descriptions.
• Ask for user confirmation before tools that change data.