Web APIs are growing at a phenomenal rate. According to Programmableweb, the number of publicly available APIs grew from 105 in 2005 to 8000 by the end of 2012, and by June 2013 the number had jumped to 9000. With enterprises going through major transformations driven by cloud, big data and mobility trends, APIs are the connective tissue of the ecosystem and interface between software programs to provide access to data and other services. Going beyond simple data access, APIs enable highly flexible infrastructure and platform availability from infrastructure and platform service providers. Moreover as everyday devices get connected to the internet, the vision of Internet of Things will require ‘things’ to provide APIs that hide underlying complexity, and deliver the right data at the right time in a manner that can scale.