Today we’re digging into the Model Context Protocol, or MCP. Think LSP for AI: build a small Python service once and your tools and data show up across editors and agents like VS Code, Claude Code, and more. My guest, Den Delimarsky from Microsoft, helps build this space and will keep us honest about what’s solid versus what's just shiny. We’ll keep it practical: transports that actually work, guardrails you can trust, and a tiny server you could ship this week. By the end, you’ll have a clear mental model and a path to plug Python into the internet of agents.<br/> <br/> <strong>Episode sponsors</strong><br/> <br/> <a href='https://talkpython.fm/sentryagents'>Sentry AI Monitoring, Code TALKPYTHON</a><br> <a href='https://talkpython.fm/nordstellar'>NordStellar</a><br> <a href='https://talkpython.fm/training'>Talk Python Courses</a><br/> <br/> <h2 class="links-heading mb-4">Links from the show</h2> <div><strong>Den Delimarsky</strong>: <a href="https://den.dev?featured_on=talkpython" target="_blank" >den.dev</a><br/> <br/> <strong>Agentic AI Programming for Python Course</strong>: <a href="https://training.talkpython.fm/courses/agentic-ai-programming-for-python" target="_blank" >training.talkpython.fm</a><br/> <br/> <strong>Model Context Protocol</strong>: <a href="https://modelcontextprotocol.io?featured_on=talkpython" target="_blank" >modelcontextprotocol.io</a><br/> <strong>Model Context Protocol Specification (2025-03-26)</strong>: <a href="https://modelcontextprotocol.io/specification/2025-03-26?featured_on=talkpython" target="_blank" >modelcontextprotocol.io</a><br/> <strong>MCP Python Package (PyPI)</strong>: <a href="https://pypi.org/project/mcp?featured_on=talkpython" target="_blank" >pypi.org</a><br/> <strong>Awesome MCP Servers (punkpeye) GitHub Repo</strong>: <a href="https://github.com/punkpeye/awesome-mcp-servers?featured_on=talkpython" target="_blank" >github.com</a><br/> <strong>Visual Studio Code Docs: Copilot MCP Servers</strong>: <a href="https://code.visualstudio.com/docs/copilot/customization/mcp-servers?featured_on=talkpython" target="_blank" >code.visualstudio.com</a><br/> <strong>GitHub MCP Server (GitHub repo)</strong>: <a href="https://github.com/github/github-mcp-server?featured_on=talkpython" target="_blank" >github.com</a><br/> <strong>GitHub Blog: Meet the GitHub MCP Registry</strong>: <a href="https://github.blog/ai-and-ml/github-copilot/meet-the-github-mcp-registry-the-fastest-way-to-discover-mcp-servers?featured_on=talkpython" target="_blank" >github.blog</a><br/> <strong>MultiViewer App</strong>: <a href="https://multiviewer.app?featured_on=talkpython" target="_blank" >multiviewer.app</a><br/> <strong>GitHub Blog: Spec-driven development with AI (open source toolkit)</strong>: <a href="https://github.blog/ai-and-ml/generative-ai/spec-driven-development-with-ai-get-started-with-a-new-open-source-toolkit/?featured_on=talkpython" target="_blank" >github.blog</a><br/> <strong>Model Context Protocol Registry (GitHub)</strong>: <a href="https://github.com/modelcontextprotocol/registry?featured_on=talkpython" target="_blank" >github.com</a><br/> <strong>mcp (GitHub organization)</strong>: <a href="https://github.com/mcp?featured_on=talkpython" target="_blank" >github.com</a><br/> <strong>Tailscale</strong>: <a href="https://tailscale.com?featured_on=talkpython" target="_blank" >tailscale.com</a><br/> <br/> <strong>Watch this episode on YouTube</strong>: <a href="https://www.youtube.com/watch?v=0V3Tah-BDy4" target="_blank" >youtube.com</a><br/> <strong>Episode #527 deep-dive</strong>: <a href="https://talkpython.fm/episodes/show/527/mcp-servers-for-python-devs#takeaways-anchor" target="_blank" >talkpython.fm/527</a><br/> <strong>Episode transcripts</strong>: <a href="https://talkpython.fm/episodes/transcript/527/mcp-servers-for-python-devs" target="_blank" >talkpython.fm</a><br/> <br/> <strong>Theme Song: Developer Rap</strong><br/> <strong>🥁 Served in a Flask 🎸</strong>: <a href="https://talkpython.fm/flasksong" target="_blank" >talkpython.fm/flasksong</a><br/> <br/> <strong>---== Don't be a stranger ==---</strong><br/> <strong>YouTube</strong>: <a href="https://talkpython.fm/youtube" target="_blank" ><i class="fa-brands fa-youtube"></i> youtube.com/@talkpython</a><br/> <br/> <strong>Bluesky</strong>: <a href="https://bsky.app/profile/talkpython.fm" target="_blank" >@talkpython.fm</a><br/> <strong>Mastodon</strong>: <a href="https://fosstodon.org/web/@talkpython" target="_blank" ><i class="fa-brands fa-mastodon"></i> @[email protected]</a><br/> <strong>X.com</strong>: <a href="https://x.com/talkpython" target="_blank" ><i class="fa-brands fa-twitter"></i> @talkpython</a><br/> <br/> <strong>Michael on Bluesky</strong>: <a href="https://bsky.app/profile/mkennedy.codes?featured_on=talkpython" target="_blank" >@mkennedy.codes</a><br/> <strong>Michael on Mastodon</strong>: <a href="https://fosstodon.org/web/@mkennedy" target="_blank" ><i class="fa-brands fa-mastodon"></i> @[email protected]</a><br/> <strong>Michael on X.com</strong>: <a href="https://x.com/mkennedy?featured_on=talkpython" target="_blank" ><i class="fa-brands fa-twitter"></i> @mkennedy</a><br/></div>