Can please elaborate what you mean by "will look at in a client"?
Basically, the RDP Discovery Service returns a JSON message that contain ERT in Cloud endpoint information (url endpoint, port, transport type, location, etc) for both RSSL and WebSocket connection.
The client can refer to the RDP API Playground as suggested by my colleague or test with a *ServiceDiscovery* example in ERT in Cloud example applications.
I believe that what you mean is your client wants to know if the RDP account they have can access the streaming discovery service or not and what it looks like?
I would recommend your client to log in to the APIDocs link provided by Nick and explores the services. Below is a sample screenshot of the service discovery page.
It's the page mentioned in the previous post.