Hi Ingo,
Surely this is possible
If you look up the documentation, HttpResponse is generalized from the HttpMessage Object. This object has a 1 to many relation with the object HttpHeader. So you could just perform a retrive on the HttpResponse object
Documentation: https://docs.mendix.com/refguide/http-request-and-response-entities
Retrive:
Thanks Reinier for you quick and helpful reply and it works. Have a nice day.