SSL Certificate Transparency Scraper (crt.sh)

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.

crt.sh Certificate Transparency Scraper

parseforge/crtsh-certificate-transparency-scraper

Search the crt.sh certificate transparency logs for any domain you control and surface the hosts behind it. Each record carries the common name, every subject alternative name, the issuing authority, serial number, and validity window. Built for attack surface mapping and asset inventory.

Certificate Transparency Monitor — AI Agent Recon API

logiover/certificate-transparency-monitor

Keyless certificate transparency intelligence for AI agents: crt.sh CT logs. Track new TLS certs for any domain, discover subdomains via wildcard, batch domains. Issuer, validity, SAN domains and serial per row. No API key, no browser.

Deep-dive SSL/TLS certificate analysis for any domain. Check certificate validity, issuer, SANs, expiry dates, cipher suites, protocol support (TLS 1.2/1.3), and certificate chain. Get comprehensive security ratings and actionable recommendations. Essential for security audits and compliance.

Subdomain Finder - Discover Subdomains via CT Logs

logiover/subdomain-finder

Discover every subdomain of any domain using Certificate Transparency logs (crt.sh). Fast bulk subdomain enumeration for security recon, attack-surface mapping, asset discovery and SEO. No API key — export to CSV or JSON.

SSL Certificate Monitor

blackfalcondata/ssl-certificate-monitor

Bulk SSL/TLS certificate monitor: issuer, validity window, days-to-expiry, chain validity, SANs and protocol for every domain, plus HTTP/HTTPS status, with expiring-soon and invalid-certificate flags and incremental change tracking. $1 per 1,000 domains.

Find all the subdomains of any website and check its SSL certificates. Paste a domain and get every subdomain seen in public certificate records, plus the certificate issuer, valid dates and days until expiry. Great for security checks and finding forgotten sites. No API key needed.

Check SSL/TLS certificate details for one or more domains. Retrieves issuer, subject, validity dates, cipher info, and chain analysis.

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.