http://ajax.googleapis.com/ajax/services/search/web?v=1.0&q=Paris%20Hilton

This URL format can also be adjusted to grab results from video search, book search and so on. While the URL has the word AJAX in the string and this is officially part of the Google AJAX Search API, this has nothing to do with AJAX per se, as the URL can be called from other environments, including the server side. All you need is a JSON library to parse the results (JSON means JavaScript Object Notation, though it also doesn’t require JavaScript). The Yahoo Search API already utilizes a similar approach, though it can return XML as well. The complete documentation of this Search API can be found on the Developer’s Guide of Google AJAX Search API hosted on Google Code