Yahoo! APIs Power Serious Applications Too

Web services aren't all fun and games. Yahoo!'s APIs let developers tap into Yahoo!'s world class data and infrastructure to help them power their business. Yahoo! APIs and Web Services are governed by the relevant Terms of Use and Usage Policy. While we make a limited amount of queries available for small-volume applications, we are also interested in working with companies to help them gain an edge by building on top of Yahoo! as a platform, applications that often require greater query volumes. See our FAQ for more info on usage. Register your application with us to apply for additional queries and be notified of system status. A great example is the Vertical Search Application from Rollyo.