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Email alerts
when certbot
fails to renew certificates

We monitor that your Let's Encrypt renewals succeedYou get instant email alerts when certbot fails

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:

Step 1

Sign up for free

Create your OnlineOrNot account in less than 30 seconds. No credit card required to get started.

Step 2

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.

Step 3

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.

Start a free trial

No credit card required.

Frequently asked questions

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
11.1M
Users
3,861
Detected incidents last week
564
    • 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 H
      Maker of Noti
    • Bet on indie hackers πŸš€

      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 Bentoumi
      Founder 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 Bowles
      Founder 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! πŸ‘πŸ‘

      Graham Lea
      Founder 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 Saxena
      Founder 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 Barclay
      Founder of Cloakist
    • OnlineOrNot does the job for me.

      Charles Miller
      Software Architect at Atlassian
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