Hi @mohamed.abdalrehim, can you please tell us more about your data requirements. Are you looking for real time, or historic time series or streaming data.
Currently, for TREP users, there is an option to use RFA.NET or Websockets API (TREP 3.2 and newer), and there are C# standalone examples in the SDK packages. None of these support REST interface.
For requesting currency data, you will have to use currency RIC like CAD= (Canadian Dollar) or GBP= (Pound Sterling).