1
Turn on Developer mode
In ChatGPT, go to Settings → Apps & Connectors → Advanced settings and turn on Developer mode.
2
Create the connector
Under Apps & Connectors, click Create. Name it Onesauce, paste the URL and set authentication to OAuth:
Onesauce MCP URL
3
Select every scope
In the OAuth settings, make sure every scope is checked. ChatGPT only asks for the scopes you select. If one is missing, the connector fails with “action discovery failed”.
4
Sign in
Click Connect, sign in to Onesauce and approve access.
5
Use it in a chat
Start a new chat, choose Developer mode from the tools menu, turn on Onesauce and ask:
What do you know about joespizza.com?
Brand card
Restaurant lookups show a card with a map, the address, service type, ratings, the lists you saved it to, and an Open in Onesauce button.Disconnecting
Go to Settings → Apps & Connectors, open Onesauce and disconnect it. Your Onesauce data stays as it is.If you see “Missing OAuth callback data” after editing the connector, delete the connector and add it again. See Troubleshooting.