These are public posts tagged with #sslchecker. You can interact with them if you have an account anywhere in the fediverse.
Looking for a #tls / #sslchecker that supports #ipv6 and #moderninternet? Try #Qualys SSL Labs (ssllabs.com) or Internet.NL
https://www.ssllabs.com/ssltest/analyze.html?d=sgryphon.gamertheory.net
https://internet.nl/site/sgryphon.gamertheory.net
Unfortunately several other prominent certificate checker tools failed to work (iban, sslstore, digicert).