This API provides the functionality for users to purchase one or more items during checkout. It allows users to add, remove, and update items from their purchase order. This includes; Get Cart Contents, Add Items to Cart, Remove Items from Cart and more. MTX provides a service that lets developers create payment solutions using points, promotional rewards, or virtual currency and coupons. MTX provides access to in-app Microtransaction's on top of a highly-scalable hosted environment for application developers to offload the heavy transaction burden.