Amazon Order API - Amazon MWS(Marketplace Web Service)

With the Orders API section of Amazon Marketplace Web Service (Amazon MWS), you can build simple applications that retrieve only the order information that you need. This enables you to develop fast, flexible, custom applications in areas like order synchronization, order research, and demand-based decision support tools. source: http://docs.developer.amazonservices.com/en_US/orders-2013-09-01/Orders_Overview.html