The OAuth 2.0 specification leaves it up to the implementer to decide which third-party apps can use the API. Contrast this with how Mint connects to your bank account.

Developers who use IMAP/SMTP to access your Gmail accounts or XMPP to interact with Google Talk can start using OAuth 2.0 now.

SSOJet delivers far more than "just SSO": we give your team the visibility, control, and security intelligence needed to defeat device flow phishing and build a future-proof identity management ...