We are pleased to announce the launch of the new Yahoo! Contacts API, which now uses OAuth to offer read, write, and sync access to the Yahoo! Address Book, one of the largest address books on the Web. We've completely reengineered the existing Contacts API and added more useful functionality for developers.
The new Contacts API provides the same features as the Yahoo! Address Book API, plus it is part of the Social API stack. Hence, it is fully compliant with the rest of the social APIs provided by Yahoo! such as Social Directory, Updates and the Status API. This allows you to mash up the APIs to create social applications for users on and off Yahoo!. To get started, visit the Contacts API documentation.
With this release, we are also going to stop active development on the old Address Book API. If you are currently using the BBAuth-based Address Book API, we encourage you to migrate to the new API so you can take advantage of the following new features, with many more to followRead More »from Introducing the all new Yahoo! Contacts API