For a deeper look into our DataScope Select REST API, look into:
Overview | Quickstart | Documentation | Downloads | Tutorials
Hello @david.roth ,
Datascope does not offer development/test environment. Access via HTTP REST is very straightforward, and (as you already know as the client is using it) .NET usability toolkit is offered as additional integration option for C# developers.
As a developer, for tuning naked HTTP REST requests to custom requirements prior to integrating them into custom code, I find Postman tool to be very useful. Please find DSS starter tutorial collection REST API Tutorials Introduction that links to downloadable started collection with multiple working requests, that can be copied and tuned to your requirements, this is the approach I would suggest to avoid issuing unnecessary requests that may count toward DSS user quota.
Hope that this information helps