CertStream

CertStream provides a real-time feed of Certificate Transparency log updates, letting you see SSL certificates as they are issued. It handles watching, aggregating, and parsing CT logs and offers libraries for Python, JavaScript, Go, and Java plus a CLI to build analytics tools with minimal code. The feed powers security tools and products like PhishFinder, enabling alerts and insights from new certificates for the security community.

AI named CertStream from February 2026 to August 2026.