After Google had it's Google API exposed for various tool builders for years already, Yahoo followed them with a web service API - utilizing REST ( the Representational State Transfer technology to handle resources in a common way – sort of enhanced session handling… )

But what's even more important and MUCH better than with Google… they expose EVERYTHING!

All the various search types are exposed and documented in these Service APIs documents:

• Image Search
• Local Search
• News Search
• Video Search
• Web Search

Checkout the Yahoo! Search Web Services today! :-) I want to see all those great tools ASAP.