InfoWorld: Yahoo opens up search platform to external developers: March 01, 2005: By : APPLICATIONS : DATA_MANAGEMENT
“With the launch on Tuesday of the Yahoo Developer Network, Yahoo is providing access to application programming interfaces (APIs) for a variety of its search services, including Web, image, video, news, and local search.Meanwhile, Yahoo is also broadening access to the Overture APIs, which have been available to high-volume advertisers for several years. Now, other types of Overture users, such as search-engine marketers and smaller advertisers, will be allowed access to the APIs.“
You can register as a developer here.