From their site: Yahoo! Site Explorer APIs provide access to information about your site from the Yahoo! Site Explorer service. These APIs help you better understand your traffic and usage -- querying for the pages in the Yahoo! index and the sites linking into a site. They will be useful to anyone looking for a good grasp of who is linking to you and to create an effective alternative to easily-spammed trackback.
The following is a list of how-to and tutorial content that matched your search term. ProgrammableWeb's how-to content comes from two sources; full-blown tutorials that we publish ourselves and other highly relevant tutorials that we find elsewhere on the Web. This list represents on combination of both tutorial types and if you go to ProgrammableWeb's API University, you'll not only be able to find more, they are organized based on your role (API providers or developers who consumes APIs). If you know of a tutorial that would be of interest to the ProgrammableWeb community, we'd like to know about it. Be sure to check our guidelines for making contributions to ProgrammableWeb.