Free Monitor Certificate expiry via RSS

The expiration of TLS certificates is usually monitored with established monitoring solutions. Sometimes monitoring happens via services that send e-mails when the expiration date comes closer. Often times, these services require a sign-up.

I created an entirely free service that monitors the expiry of TLS certificates via RSS without any sign-up.

How it works

With your RSS Feed Reader of choice, you subscribe to

https://scrutineer.tech/monitor/cert/{domain}.rss

Example for scrutineer.tech: https://scrutineer.tech/monitor/cert/scrutineer.tech.rss

Some background info

• This is a free service without sign-up
• Notifications are generated 30 days, 7 days and 1 day in advance
• No guarantees are given, for nothing 🙃
• There are no checks for the trustworthiness of certificates. Only the “Not After” field is checked
• Which means self-signed certificates work

How it looks