Any recommendations - From COS, From .net?

Did some quick testing replacing Intersystems.Data.CacheClient.dll with Intersystems.Data.IRISClient.dll and ran against Cache 2018.1 and IRIS 2019.1. Seems to work in both cases. Is it a safe assumption that the IRIS dlls are backward compatible with Cache 2018.1?

Need a sample of  using %Net.HttpRequest and %NetHttpResponse  from Cache to retrieve and then use/reuse a bearer token to send json data to a REST web service.