Errors

The MOFH API doesn't return any error codes, and will always return a 200 HTTP code for any request.

You would have to get the text inside the <status> </status> tags to get the status of your request (either 0 or 1). Or if you try to use the getuserdomains.php and getdomainuser.php endpoints you will see that it just returns NULL instead of the list/array it usually gives.