The Checkbox 6 Web Services are built using Windows Communication Foundation (WCF). We recommend building your application using the latest version of the .NET Framework (version 4.6 at the time of this document’s release) in order to take advantage of improvements in the WCF stack.
Each of our Web Services has a Web Services Description Language (WSDL), which informs the client how to communicate with the service. This means that the services may be accessed using a number of different clients (environments and languages, i.e. Java). It is up to you, the developer, to reference the Web Services appropriately.