I'm implementing the OAuth system through StackExchange API, here is the guide: https://api.stackexchange.com/docs/authentication#scope.

I've already integrated the OAuth system with stack overflow with the following parameters: Token URL: https://stackoverflow.com/oauth/access_token/json Auth URL: https://stackexchange.com/oauth And it works just fine!

My question is: how do I integrate other channels? Where can I find the auth url to pass in the OAuth flow? For example to OAuth to mathematics, this Auth URL (https://mathematics.com/oauth/access_token/json) doesn't work!

What should I use to perform the OAuth flow to other channels like SuperUser, StackApps, StackExchange, Mathematics etc...? Where can I find the correct Url?