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7/25/2026
Building an MCP server in Python (and connecting it to Claude Code)

Building an MCP server in Python (and connecting it to Claude Code)

Short summary

A practical tutorial showing how to build a minimal MCP (Model Context Protocol) server in Python using the official SDK and connect it to Claude Code. The server exposes a single tool (word-count) via stdio transport, and registration in Claude Code takes one command. The entire setup—from project init to end-to-end connection—took about 10 minutes.

  • •MCP is an open standard for connecting AI apps to external tools/data, acting like USB-C for AI integrations
  • •Build a server with FastMCP Python SDK: annotate a function as a tool, run via stdio transport
  • •Register in Claude Code with a single 'claude mcp add' command pointing to your server script

Generated with AI, which can make mistakes.

#ai-tools#open-source
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