Hi Altin,
I’m afraid at present there’s no way to retrieve the integer id value as a separate attribute from our API. I’ve explained the reasons for this on this past forum thread: Please include id in responses.
If you’re unable to use resource URIs as unique identifiers, could I ask you to give me a bit more details about what numeric ids would allow you to achieve that URIs don’t and how you’d use them?
Best wishes,
Ewa