Microsoft Bing API

Bing API Version 2.0 enables developers to embed a flexible and powerful search engine as a custom search component in thier sites and applications. Bing API offers open, flexible options for building or enhancing your site or applications. With the API users can search for web content, images, stories and more. Users can also monetize their applications with advertisements. It uses a RESTful protocol with results formatted either in XML or JSON and also provides support for SOAP protocol.