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Webhook alerts
when your
website goes down

Monitor your websites, APIs, cron jobs & scheduled tasksSend webhook alerts to your tools when things break

Free 14-day trial · No credit card required

Trusted by thousands of businesses

Get webhook alerts when your site goes down

When your website breaks, you probably want to do more than just get a notification. Webhooks let you trigger actual fixes and updates automatically.

Restart containers, update your status page, create GitHub issues, trigger deployments, or run any custom script. You get structured JSON data you can actually work with.

Build the monitoring setup that fits how your team actually works.

How to setup webhook alerts for website downtime:

Step 1

Add your webhook URL

Paste your endpoint URL into OnlineOrNot. We'll send a POST request with JSON data whenever your site goes down.

Step 2

Build your automation

Use the webhook data to restart containers, update status pages, create GitHub issues, or call other APIs. The JSON includes everything you need.

Step 3

Set it and forget it

Auto-restart failed services, trigger rollbacks, update monitoring dashboards, or whatever fixes make sense for your setup.

No credit card required.

Frequently asked questions

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Trusted by software teams worldwide

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: 11.8M
Users: 4,164
Detected incidents last week: 775

- 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 🚀
  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! 👏👏
  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