Does ASK only send request to port 443 on the endpoint?
I set up another server and it has a different HTTPS port, for example, port 444. When I test the skill, I don't see any POST request coming to my web server endpoint. So I would like to know if ASK only accept port 443?
ASK only supports 443. There's a feature request floating around somewhere asking them to support other ports. I seem to remember the reply from Amazon was the usual "we'll pass it on to the team", but also that they do so for security reasons.