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Zeitgeist — a spike by Chris Gathercole
  1. Creators/
  2. Simon Willison — Creator of Datasette; co-creator of Django/

Adding a custom MCP server to Claude and ChatGPT

Blog/TIL · Blog · TIL

  • Practical TIL-style walkthrough on connecting a custom MCP server to the Claude and ChatGPT web interfaces — Willison notes it “can take quite a few steps” despite both platforms supporting it.
  • Part of the same week’s renewed MCP push (see “Stateless MCP has recaptured my interest” above) — links to modelcontextprotocol.io documentation and his own mcp-explorer tool.
  • Takeaway: MCP client support has landed in mainstream chat UIs, but onboarding a custom server still has real setup friction worth documenting.