Check a domain's HTTPS certificate: issuer, validity window, days until expiry, the hostnames it covers, the negotiated TLS version, and a letter grade with any problems found. Use this to answer whether a site's certificate is valid, who issued it, or when it expires.
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What this tool does
Check a domain's HTTPS certificate: issuer, validity window, days until expiry, the hostnames it covers, the negotiated TLS version, and a letter grade with any problems found. Use this to answer whether a site's certificate is valid, who issued it, or when it expires. Use it on Webscore Now with an agent. It runs in the browser on the website and needs no package install.
How to install
Open the webscore.now website and ask your browser agent to use check_ssl
Run with an agent
Use the check_ssl tool on webscore.now with domain: <string>. Return the structured result and cite the source page.
Input contract
domainstringThe domain to check, e.g. example.com (a full URL is also accepted).
Verify the live listing at the source before a production call. Fields marked as a starter contract may differ from what the site expects.