From billion dollar companies to the neighborhood coffee shops, merchants of all sizes are seeking new ways to offer secure and affordable mobile payments systems that expand their ability to conduct business. The PayPal API got its start this way, first with online auctions, then with thousands of websites and individuals. It's now one of over 150 payment APIs, many of which exist outside of traditional finance.
Twitter, Facebook and LinkedIn have some new company. The Klout API is launching a new service to "sign in with Klout." Called KloutPass, it gives developers access to user influence data at the moment someone signs in. It also gives Klout the opportunity to be a stealthy player in the coming identity wars.