What do I put as my Reddit API callback URL to get back to my GPT?

I am trying to play around with the Custom Actions inside of the new Custom GPTS. I decided to try to do Reddit, but cannot get the authentication to work. I am making the OAuth app in Reddit, but it asks for a Redirect URL and I have no idea what to put there. Any help would be amazing.

Screenshot 2023-11-29 at 12.48.12 PM

However, since you’re dealing with a Custom GPT-3 application and not a traditional web application, you would not have a URL to provide. The OpenAI platform does not directly handle the OAuth process, so it doesn’t provide a callback URL.

I believe there’s a way you can send it to your own server and pass the token? You might search around the forums a bit for “oAuth” and similar…