Edit: Sorry, I misread your post. To add, cpprestsdk has 2 impls for Windows - one based on top of WinHTTP and the other based on WinRT APIs. On UWP, cpprestsdk

Edit: Sorry, I misread your post. To add, cpprestsdk has 2 impls for Windows - one based on top of WinHTTP and the other based on WinRT APIs. On UWP, cpprestsdk uses the WinRT APIs and by extension so does NFHTTP.