mcp

Simon Willison explains how to add a custom MCP (Model Context Protocol) server to Claude and ChatGPT, enabling these chat interfaces to query external data sources like his blog’s database. In Claude, adding an MCP is straightforward via the Connectors menu, while in ChatGPT it requires enabling Developer mode, adding the MCP as a plugin without authentication, and manually activating it for each chat session. However, MCP plugins are not supported in ChatGPT’s Advanced Voice mode.

https://til.simonwillison.net/llms/mcp-in-claude-and-chatgpt