Periodically
Serveo is down and reaching
serveo.net is effectively a good hint to determine
if it's because of you or Serveo itself. Because of this I proposed to add a
paid service beside the free one (because it's difficult to maintain a free
service which is more subject to be used by any kind of indelicate activities;
e.g., phishing) : see
https://groups.google.com/g/serveo/c/B9EnR4uxc8Y (if
you feel it, you can vote over there, of course).