Intel / article

Adding a custom MCP server to Claude and ChatGPT

Source: simonwillison.net
Date: Published Jul 29, 2026

Why it matters

Connecting a custom server to the ordinary Claude and ChatGPT chat apps — not just IDE clients — takes several non-obvious steps; this walks the actual path for both.

Terms in this piece · Glossary

MCP — The Model Context Protocol — an open standard that lets any AI assistant plug into any tool or data source without custom integration code.

Read the source simonwillison.net