Amazon Services
Amazon Marketplace Web Service (Amazon MWS) Documentation
Amazon MWS Documentation

Monitoring and tracking FBA shipment status

You can use the Orders API section or the FBA Fulfilled Shipments Report of the Reports API section to monitor and track the shipment status of each item in your FBA fulfilled customer orders, regardless of whether your orders were placed on Amazon's website or through other retail channels. The Orders API section provides real-time data and the Reports API section provides asynchronous batching of data. With these API sections you can update your local systems with billing information and customer payment information, including shipping fees, gift wrapping fees, and promotion information.

For more information, see Orders API and What you should know about the Amazon MWS Reports API section.