Can we use REST client to call the WEbsocket API for the following services. Of so please share the postman collectionfor the same.
1. Authentication (HTTP Connection)
3. Item Request
No, you cannot. Please be informed that the HTTP REST and WebSocket connections are different. You cannot use the REST example or Postman to make a WebSocket connection.
I highly recommend you check the following WebSocket API and RTO tutorials and resources pages first:
The above resources will give you a step-by-step guide and a clear explanation regarding how to use the WebSocket connection to connect and consume real-time data from RTO.