PLUGIN_HOSTNAME is of course replaced with the plugin hostname.
I get “couldn’t find manifest” error despite the fact that I can see in logs that there is request to my manifest file with response 200 (suggesting that everything is all right), when I press the button in “Develop your own plugin” in ChatGPT.
If you have successfully connected ChatGPT plugin with OAuth implementation, could you share your steps? Could you also share your manifest file (before you have received the verification code)?
Yes, all plugins on the Plugin Store are using this.
It sounds like an error validating the manifest file. i.e. You have some invalid/missing fields. If you paste your full manifest file it will be easier to check. I can’t see anything that’s obviously wrong from what you shared above. Perhaps try with an empty string verification token to see if that helps?