It lives under Advanced settings in the same dialog, and most people never need it. If it is asked for, paste this — it is public and the same for everyone:

Custom connectors need a paid ChatGPT plan — Pro or above (Plus, Business and Enterprise also carry the setting; the free tier does not). On the web version:

1. Open Settings → Security and login and switch on Developer mode. Accept the warning about running third-party connectors.
2. Go to Settings → Plugins and press the + button that has appeared.
3. Give it a name you will recognise later — GameDev Reports — and paste the URL above, ending in /mcp.
4. Choose OAuth for authentication and, if a Client ID is required, paste the one above.
5. Sign in with this same email address and approve access. Then pick the connector from the tools menu in a chat.

On a work or school account an admin may have to permit custom connectors first. ChatGPT moves these settings around fairly often, so if the labels differ, look for connectors, apps or plugins in the settings. Any other assistant that speaks the open Model Context Protocol works with the same URL.

If the assistant says your subscription is not active, make sure you signed in with the email address your GameDev Reports subscription is billed to — access is checked against it on every request. Still stuck? Reply to any newsletter email and we will sort it out.