The Google Friend Connect API gives developers an easy way for one-click user authentication using any of Google, Yahoo, AIM, or OpenID accounts. Google Friend Connect APIs enable developers integrate social flows and data directly within a page's markup, via the OpenSocial standard specification. Integrate existing login systems, registered users, and existing data with new social data and activities. Create social gadgets and services that are embeddable within millions of Friend Connect enabled sites.
Google this week released a new API for Friend Connect (our new Friend Connect API Profile), its relatively new service that enables social networking features to be easily added to any existing web site (utilizing copy and paste code that leverages OpenID, OAuth, and OpenSocial). The API allows developers to tap into some of the core features of Friend Connect.