A common contact list has helped power applications like Gmail, Google Reader, and Google Calendar. And now, with the launch of the Google Contacts Data API, we're opening up this contact list to your applications as well.

Based on AtomPub, the Contacts API can be used to safely read, create, edit, and delete contact information stored with Google, all while keeping users' passwords private via delegated authentication and authorization. Learn the details from Sebastian Kanthak in his announcement post on the Google Data APIs blog, and join the conversation on the Contacts API Group.