Samsung LYNK

I’m working with Samsung LYNK Projects (Wordpress site basically) and trying to make a request to backend for a xml file related to this specific device by it’s (some kind of) ID. The problem that I can’t receive in headers/send from frontend any sort of unique ID to the the backend . Devices and backend server would be in one network, so x-forwarded-for header wouldn’t work for me, and didn’t find any other workarounds for my type of issue. Is there any constant device identifier to connect specific device frontend to it’s xml file on the backend? I can’t use tizen api in Samsung LYNK Wordpress project, right?