Google has just released the first Google+ API, Its focus is on public data which lets you share read information that has been shared publicly on Google+
Google has also released a Google+ developers site This will be the place to go for their policies, terms, discussions with other developers, access to documentation.
Tools that make development on the Google+ platform easier and more fun, and of course, the place where announcements concerning new releases will be made.
See the Google post for more details.</p>