Sign Up for Cert Spotter API

Search SSL certificates by domain name using a simple API.

Improve Your Infrastructure Monitoring

You can use the Cert Spotter API to look for unknown or unauthorized certificates, and find certificates that are expiring soon.

Download Only What You Want

The Cert Spotter API returns certificates for only the domains you're interested in. You don't have to download every certificate and look for a needle in a haystack.

Find Previously-Issued Certificates

The Cert Spotter API returns certificates that have already been issued, not just certificates that are issued after you start monitoring.

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