Does Google Cloud Endpoints support incremental authentication?

Question

I found documentation for adding incremental authorization when using the Google 2.0 Sign-in button here.

However Google Cloud Endpoints uses a pretty different sign in flow utilizing the methods documented here, with a tutorial for set up found here.

The gapi.auth.authorize (Endpoints schema) and the gapi.auth2.init method seem fairly different. However the gapi.auth2.init method has a documented means of achieving incremental authorization. Is this possible with Google Cloud Endpoints when using the built in authentication schema?

Answer 1

The JS client library handles the authentication for calls to your Google Cloud Endpoints no matter what authentication method (gapi.auth or gapi.auth2) you used. So everything should work as long as you are calling your endpoints via gapi.client.yourApi methods.

Only important thing is, that the email scope has been authorized before calling methods that require authentication, because access to the user's email address is required by Google Cloud Endpoints.