Ecommerce Account Billing is a collection that handles ecommerce transactions. There are two API documents available. Use the programmatic API available through Nuget to write server-side applications that create invoices, charge customers, manage and access account information, etc.
Use the Endpoint API to make remote calls to an application to access data.
This page documents the Account Billing Endpoint Api (accessing an application's data through an endpoint.)
This page documents the Account Billing programmatic api (accessing ecommerce from within a server application) available through the Nuget Package Contensive.EcommerceApi.