Microsoft Project Silk Road that allows publishers and developers to use a flexible search engine to power their online business, is now serving more than 3 billion queries/month and have received more than 5,000 applications to uThe point of Project Silk Road and API 2.0 is to provide an extensible search platform: You have nearly complete control over how you want to rank and format the results, and you can choose from JSON, XML, or SOAP protocols.se the API, revealed Angus Norton. If interested, sign up to use the API.