SSL Certificate Monitor: New Certs & Subdomains

Scrape SSL/TLS certificate transparency logs from crt.sh for any domain. Great for security audits and subdomain discovery. Returns common name, subdomains (SANs), issuer and validity. Pay per certificate; empty runs free.

SSL Certificate Checker

automation-lab/ssl-certificate-checker

SSL Certificate Checker connects to domains over TLS and inspects their SSL certificates. It returns structured data about certificate validity, expiry, issuer chain, TLS protocol version, cipher suite, and a security grade from A+ to F.

SSL Certificate Checker — Bulk Expiry & Chain Monitor

nexgendata/ssl-certificate-checker

Bulk SSL/TLS certificate checker: for a list of domains, returns validity, expiry/days-remaining, issuer, subject, SANs, protocol, and cipher. For DevOps, security, and cert-expiry monitoring.

Subdomain Finder — Certificate Transparency (crt.sh)

bgfc97/crtsh-subdomain-finder

Discover subdomains of any domain from public Certificate Transparency logs (crt.sh). Attack-surface mapping and recon with first/last-seen dates. No key, no proxy.

SSL Certificate Checker - Domain TLS Expiry & KYB API

pink_comic/ssl-certificate-checker

Bulk SSL/TLS certificate checker for domain KYB and HTTPS audits: expiry, issuer, SANs, chain validation, TLS version, and cipher evidence. Catch expired or misconfigured certs before outages. Related: whois-domain-lookup, dns-lookup-records, website-tech-stack-scanner.

SSL Certificate Expiry Monitor

andok/ssl-certificate-monitor

Monitor SSL/TLS certificate validity and expiration dates across thousands of domains to prevent costly outages.

Subdomain Finder & Recon Tool

andok/subdomain-finder

Discover subdomains for any target via passive OSINT sources. Ideal for security bug bounties and attack surface mapping.

Track new published versions and deprecation warnings for npm packages you depend on. Get the version, publish date, and deprecation status the moment it changes. For engineering and security teams monitoring dependencies without checking npm by hand.

SSL Certificate Expiry Checker for Any Host

m_ctim/ssl-certificate-expiry-checker

Check the live TLS certificate on any host: issuer, subject, valid dates, days until expiry, and whether it's expired or self-signed. For ops and IT teams catching cert expirations before they cause an outage, across as many hosts as they need checked.

Check SSL/TLS certificates in bulk and monitor expiry dates, issuers, SANs and validation errors.