Adding a custom MCP server to Claude and ChatGPT

TIL Adding a custom MCP server to Claude and ChatGPT — I've started exploring [MCP](https://modelcontextprotocol.io/) in more detail. The web chat UIs for both Claude and ChatGPT can access MCP servers but it's not obvious how to set them up. Here's what I figured out.

Source: Simon Willison — Published — Category: Tools

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