I still don't think returning a 418 (in the realm of client errors) is the correct code, even if it is a connected teapot which you're trying to identify! I th

I still don't think returning a 418 (in the realm of client errors) is the correct code, even if it is a connected teapot which you're trying to identify! I think the appropriate action would be a client sends an HTTP HEAD to the service, which responds 200 "TEAPOT".