Consumming a API REST/POST with XML file

Hi,

I have a requirement where I need to consume an API (REST/POST – format XML). I received the format of xml file to send to the API. This API will return an xml file too.

My SAP_BASIS version is 702, so I not have the REST library. The URL is not fix, it change according to SAP mandant (I think, I can’ use the SM59 config).

What classes or methods I should use?. (I'm working with SAP CRM)

thanks a lot.