AFAIK you cannot override NetSuite's HTTPS status codes

Seconded. You cannot set the code yourself. You can

return

normally for a

200

, or you can

throw

for a

400

I’m calling the Suitelet from a client script Promise so I just need the status code to bubble up properly so I can let the Promise do it’s job. Trying to avoid error handling in the

then()

function if possible.

throw

will give you a 400