Many of the highest traffic sites get more than half of their traffic not through the browser but through the APIs they have created Salesforcecom (more than 50) & Twitter (more than 75 fall into this category Ebay gets more than 8 billion API calls a month Facebook & Google have dozens of APIs that enable both free services & e-commerce get more than 5 billion API calls each day Other companies like Net Flix have expanded their service of streaming movies over the the web to dozens of devices using API At peak times more than 20 percent of all traffic is accounted for by Netflix through its APIs Companies like Sears & E-Trade are opening up their catalogs & other services to allow developers & entrepreneurs to create new marketing experiences Making an API work to create a new channel is not just a matter of technology An API must be considered in terms of business strategy marketing & operations as well as the technical aspects of programming This book written by Greg Brail CTO of Apigee & Brian Mulloy VP of Products captures the knowledge of all these areas gained by Apigee the leading company in supporting the rollout of high traffic APIs