Hi there ^^ I'm delphi coder , actually I used to do simillar jobs just like the one you have mentioned , well starting by the new vesrions of delphi , delphi now supports REST API which is referenced in your project , delphi supports a set of easy components that sends Rest Request (in JSON or XML) and get responses also supports authentication services , where the old days ways works also , by sending a request via Indy components for example and parse the response manually , anyway provide me with more info and I will do my best ^^
Best Regards