Offline access for Google APIs is achieved through a refresh token that is issued when a user first visits the app and grants offline access. Essentially, you have to ask for offline access, Google warns them that you are asking for it, and then they have to grant it. The return contains the golden ticket [...]

In the Authenticating with OAuth 2.0 for Google API Access with PHP post, an access token was retrieved for calls to Google APIs for data. In this post, the user’s name will be retrieved from their account. To do that, the access token needs to be sent as a header param or query param with [...]

Google is leading developers to OAuth 2.0 for access to its API’s: Given the security implications of getting the implementation correct, we strongly encourage developers to use OAuth 2.0 libraries when interacting with Google’s OAuth 2.0 endpoints (see Client libraries for more information). Over time, more features will be added to these libraries. Steps Register [...]