Email alerts
when certbot
fails to renew certificates
No credit card required
Trusted by thousands of businesses
Setup email alerts for certbot failures in seconds
OnlineOrNot monitors your Let's Encrypt certificate renewals by tracking heartbeats from your certbot processes. The moment a renewal fails and doesn't send its expected heartbeat, you'll receive an instant email notification so you can fix the issue before certificates expire.
Don't let expired SSL certificates break your users' trust. Get notified immediately when certbot encounters issues with domain validation, rate limits, or server problems.
Try OnlineOrNot now!
How to get email alerts when certbot fails:
Sign up for free
Create your OnlineOrNot account in less than 30 seconds. No credit card required to get started.
Add heartbeat to your renewal script
Add a simple HTTP ping to your certbot renewal script or cron job. When renewals succeed, the heartbeat confirms everything is working.
Get instant alerts
If certbot fails and the heartbeat doesn't arrive, you'll receive an email notification within 1-2 seconds. Fix renewal issues before certificates expire.
No credit card required.
Frequently asked questions
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Software teams ❤️ OnlineOrNot
OnlineOrNot is built for scale and runs millions of uptime checks every week. Thousands of software teams, including some of the world's leading brands have already made the switch from other uptime monitors.
- Uptime Checks last week
- 11.5M
- Users
- 3,889
- Detected incidents last week
- 615
OnlineOrNot has been absolutely fantastic for my bot, Noti. It completely transformed the way I monitor online services.
The real-time notifications keep me in the loop about any downtime, allowing me to take immediate action. If you're looking for a reliable way to monitor your project's status, I highly suggest using OnlineOrNot.
Adam HMaker of Noti
Bet on indie hackers 🚀
I tried @RozenMD's OnlineOrNot uptime monitoring, and for a few days got notifications of 2min down time.
I thought that OnlineOrNot was wrong as Uptime Robot wasn't reporting anything.
Turns out it was the other way around.
Khaled BentoumiFounder of Data to Page
We've been using OnlineOrNot and it has been a life saver.
It, by far, has been one of the most responsive uptime services we've tried and it only gets better and better as time goes on.
Alex BowlesFounder of Casterlabs
I just set up some site aliveness checks for @Archium_io with @RozenMD's OnlineOrNot.
Took me less than five minutes and it was completely self-explanatory, not to mention gorgeous. Seriously good experience.
Great job, Max! 👏👏
Graham LeaFounder of Archium.io
OnlineOrNot by @RozenMD is all one needs
It is easy to set up and very reliable. I have been using it for almost an year now.
Rajat SaxenaFounder of CourseLit
I'm using OnlineOrNot to monitor my @cloakist customers' sites, so I can respond quickly if they stop working
Love it. Super clean interface, very intuitive. Particularly impressed at how it can wait for full page load
Thanks @RozenMD for making this awesome tool!
Louis BarclayFounder of Cloakist
OnlineOrNot does the job for me.
Charles MillerSoftware Architect at Atlassian
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