cert-transparency-watcher (1.0)

cert-transparency-watcher 1.0

cert-transparency-watcher is a free, open-source CLI tool that monitors public Certificate Transparency (CT) logs for newly issued TLS certificates covering your domains. It gives security teams an early-warning signal for unauthorized or unexpected certificate issuance (a classic sign of a subdomain takeover or MITM setup) without needing a paid SaaS monitoring service. Written in Python, MIT licensed, from Errant Solutions - a small independent software studio also behind sshd-hardening-auditor, tls-cert-watchdog, and other free security tooling.