False. It's up.

Alas, does not accept TLS1.3.

     printf 'HEAD / HTTP/1.0\r\nhost: bot.incolumitas.com\r\nconnection: close\r\n\r\n'|openssl s_client -connect 167.99.241.135:443 -ign_eof
     printf 'GET / HTTP/1.0\r\nhost: bot.incolumitas.com\r\nconnection: close\r\n\r\n'|openssl s_client -connect 167.99.241.135:443 -ign_eof
     echo|openssl s_client -connect 167.99.241.135:443  -showcerts|openssl x509 -text

It's been down for months, sadly. I was working on some dummy Puppeteer human-behavior script back then and the site helped a lot. Hope the guy's doing alright :/

I just get a 403. I assumed it was because of my VPN but even without it I get the same result.

Not down for me.

   echo 167.99.241.135 bot.incolumitas.com|sed -i -e1r/dev/stdin -e1N /etc/hosts
   FTPUSERAGENT= tnftp -4vdo/dev/stdout https://bot.incolumitas.com
   links -no-connect https://bot.incolumitas.com
   sed -i 1d /etc/hosts

   curl --resolve *:443:167.99.241.135 https://bot.incolumitas.com