[API] Google Custom Search API

http://code.google.com/apis/customsearch/

What is Custom Search?

Google Custom Search enables you to search over a website or a collection of websites. You can harness the power of Google to create a search engine tailored to your needs and interests, and you can present the results in your website. Your custom search engine can prioritize or restrict search results based on websites you specify. You can even invite your friends and trusted community members to contribute and help you build your search engine. Plus, you can make money from your search engine by using your Google AdSense account.