I'm not sure about exact features of this service (I didn't know about it), but I'm using: - https://www.ssllabs.com/ssltest/ https://www.ssllabs.com/ssltest/

I'm not sure about exact features of this service (I didn't know about it), but I'm using: - https://www.ssllabs.com/ssltest/ https://www.ssllabs.com/ssltest/ - nmap --script ssl-enum-ciphers news.ycombinator.com -p 443 The nmap one works with various non-HTTP protocols, such as IMAPS and FTPS. The Qualys service is much more detailed, including hints about certificate chain problems etc.