[TimNN]

There already is: https://github.com/evict/SSHScan

[bechampion]

and returns almost the same details , there is also a nmap script https://nmap.org/nsedoc/scripts/ssh2-enum-algos.html I've always found these kind of webapps attractive in a way ... the fact that it may be doing a os.popen("nmap -vv bla bla bla") makes me uncomfortable ,