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How to add the xmp4 — Semantic code knowledge for your stack MCP server to ChatGPT

Server URL: https://mcp.example4.ai/mcp
Sign-in: No sign-in. Paste the URL and it connects.
Our hands-on result: Works 7 of 7 tasks passed, tested Oct 17, 2026 with MCP TypeScript SDK (reference client).

ChatGPT setup

https://mcp.example4.ai/mcp

1. Open Plugins on chatgpt.com, click the plus button, then Add custom MCP server. On some plans you first turn on Developer mode under Settings.
2. Name it ai-example4-xmp4 and enter the URL: https://mcp.example4.ai/mcp
3. Set authentication to none.
4. Tick the risk acknowledgement, create it, then start a new chat and pick it with @.

We ran the hands-on test in a reference client, not in ChatGPT. This config follows ChatGPT's documented format for remote (Streamable HTTP) servers. If it fails for you, tell us and we will retest.

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