When I throw exception in resource:

throw new \Exception('Error', 4000010);

I get:

• 500 in HTTP status code
• 4000010 in API problem status (content)

Apigility documentation says (https://apigility.org/documentation/api-primer/error-reporting):

status: the HTTP status code for the current request (optional; Apigility always provides this).

And API problem documentation (https://tools.ietf.org/html/draft-nottingham-http-problem-06):

"status" (number) - The HTTP status code ([RFC2616], Section 6) generated by the origin server for this occurrence of the problem.
The status member, if present, is only advisory; it conveys the HTTP status code used for the convenience of the consumer. Generators MUST use the same status code in the actual HTTP response, to assure that generic HTTP software that does not understand this format still behaves correctly.

BTW Response after

throw new \Exception('Error', 200);

looks funny :-)