Google OAuth API to get user's email address?

Question

I am playing with Google\'s OAuth 2.0 Playground using my own personal Google account, but I cannot seem to recover my Gmail address using the playground.

The scope

Answer 1

As of 2017: use the email scope. See Authorizing API requests.

This email scope is equivalent to and replaces the https://www.googleapis.com/auth/userinfo.email scope.