Certificate Transparency Monitor — New Certs by Domain

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.

Subdomain Finder — Certificate Transparency Search

accountable_eel/subdomain-discovery-lookup

Enumerate any domain's real subdomains from the free, public Certificate Transparency log API (certspotter) — no login, no scraping. Every subdomain returned had an actual TLS certificate issued for it. Pay only when subdomains are found; domains with no CT history cost nothing.

Certificate Transparency & Subdomain Discovery Scraper

scrapers_lat/certificate-transparency-scraper

Discover subdomains and SSL/TLS certificates for any domain from public certificate transparency logs. Extract SAN hostnames, issuer, validity dates, wildcard and expiry flags. Perfect for attack-surface mapping, OSINT and asset inventory. Export to JSON, CSV or Excel.

Monitor SSL certificates for expiry, chain validity, and cipher suites. Discover subdomains via Certificate Transparency logs (crt.sh). Alerts for certificates expiring within N days. No API key required.

SSL/TLS Certificate Checker — Expiry & Chain Monitor

accountable_eel/tls-certificate-lookup

Look up any domain's TLS certificate history from public Certificate Transparency logs — issuer, validity window, and full SAN list for every certificate ever logged. No API key. Pay only for domains with certificates found.

Certificate Transparency Scraper: Subdomain Discovery

arman-bd/certificate-transparency-scraper

Query certificate transparency logs via crt.sh to enumerate subdomains, issuers, validity windows and certificate history for any domain. Passive attack-surface discovery. no login, no proxy, no browser.

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.

Day-zero startup leads from Certificate Transparency: crt.sh finds domains whose FIRST TLS cert was just issued, we enrich each new site's OWN website with MX/DNS-verified emails + phones + socials + tech stack + A-D launch-readiness. Be first to a newly-launched business. Per-result, no keys.

Certificate Transparency Log Firehose

jungle_synthesizer/certificate-transparency-log-firehose-scraper

Streams newly-issued certificates from public CT logs (Google, Cloudflare, DigiCert, Sectigo, TrustAsia) with a keyword/pattern watch-list match — delta-since-last-run, not a one-domain lookup.

crt.sh Certificate Transparency Scraper

parseforge/crtsh-certificate-transparency-scraper

Search crt.sh certificate transparency logs for a domain and discover subdomains. Get common name, SANs, issuer, validity dates, and serial number per certificate.