Thanks for the comment!
Maybe my goals where both for security and normal web development testing.
I'm personally software developer and cybersecurity is my hobby. First I thought I had unique idea, but one friend working in the infosec area told about Nessus etc tools. Then I thought I finish my tool and see if some users are interested.
wacat detects a response HTTP code and if that is >= 400, it reports error. Then wacat can also detect error etc strings in the response page it they are configured.
Maybe my main focus is in the normal web testing. I have found that companies don't have enough end-to-end testing and wacat is easy to use tool to do some kind of testing. Even smoke testing with the --only-links flag. wacat also supports CI pipeline with the --headless flag.
BR,
Mika