Support iOS through WebAPI

Would it be conceivably possible to support iOS devices via WebApi? The iOS device would make a call to the Ingenious server to check to see if an authorization is valid.

Has anyone tried this?

The goal is to be able to access and verify a valid authorization from the iOS device via WebApi or RestAPI.

Say for instance a person purchases a Turbo.Activate product and has authorized it. I want to reward the desktop customer with access to the iOS device. I should be able to use WebAPI to return back information to the authorization to see if it is activated. If activated, then I can allow access.

I'm not trying to use WebAPI as a means of protecting software on iOS.