The Poloniex Python API enables developers to access the Poloniex API's functions from Python code. This library shows users how to retrieve their open orders and trade histories, place buy and sell orders, cancel orders, and place a withdrawal for a given currency.
Last month CIO Insight magazine published a piece by Edward Cone "Inside eBay's Innovation Machine", an interesting report on the importance of APIs and developer network to eBay's overall strategy. It's a worthwhile read, especially in terms of the scope of their program, how it's run, and where the money is.
With iZettle's new iOS API it is possible to include credit card payments in any IOS app. iZettle is a Swedish company known in locally as “Spotify for payments” and in the US as “the European Square”. Using their chip card reader and iOS app, small businesses and individuals can charge via VISA, Mastercard, American Express or Diners Club and the payment is finalized with the card holders signature written with the finger straight on the iOS screen. So far the payment service is available in Sweden, Norway, Denmark, Finland and is being tested in the UK. They just got a €25 million to roll out in more countries world wide.