How to Get Alerted When Your Website Goes Down

The point of monitoring is not the dashboard — it is the alert. Getting notified the moment your website goes down, through a channel you actually watch, is what turns monitoring into fewer minutes of downtime and less lost revenue.

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Be the first to know your site is down, in a channel your team actually watches.

Why finding out late is so costly

The cost of downtime is really the cost of the gap between the failure and your response. If a site goes down at 2am and you find out at 9am, you have paid for seven hours of lost visitors, orders, and trust that a fast alert could have prevented. The technology to detect the outage is only useful if it reaches a human quickly.

Relying on customers to tell you is the worst case. By the time someone emails support or posts on social media, the problem has already affected many more people who simply left. Alerts exist so that you are the first to know, not the last.

The other failure mode is the opposite: alerts so noisy or unreliable that people stop trusting them. A single blip that fires a page at 3am, or a flood of duplicate notifications, trains a team to ignore the alerts entirely — which is just as dangerous as having none.

NorthDuty availability and security checks: HTTP status reachable, DNS resolves, SSL certificate trusted with 43 days to expiry, domain registration healthy, visible content detected
The availability layer of a NorthDuty check on our demo store: HTTP status, DNS, SSL expiry, domain registration and blank-page detection in one run.

How to set up reliable downtime alerts

Good alerting starts with a check that runs often enough and is accurate enough to trust. NorthDuty checks your pages on a schedule and, because each check renders the page, it can alert not only when the site is fully down but also when a page loads blank, errors, or loses a critical element — the 'up but broken' failures a ping would miss.

When a check fails, NorthDuty sends the alert to the channels your team actually watches: email, Slack, and more. Routing alerts to a shared channel means the right people see it immediately, rather than a notification sitting unseen in one person's inbox.

Alerts include the specific reason for the failure — a navigation error, an SSL problem, a blank page, a failed journey — so you can start fixing the actual issue instead of investigating from scratch. That context is the difference between a five-minute fix and an hour of guessing.

You can also give customers their own view with a public status page, so during an incident they see acknowledged, accurate information instead of flooding your support channel.

NorthDuty journey run for an online rental booking: steps 1 to 5 pass, step 6 fails because the availability check returned HTTP 504, with a screenshot showing the booking form's timeout message
A real NorthDuty journey on our demo store: the booking page loaded and every option was selected, but the inventory API behind Check availability returned a 504. Uptime stayed green; the journey failed at the availability step, named the request, and kept the screenshot.

What good downtime alerting looks like

Reliable alerting is about speed, the right channel, and enough context to act.

Alerts reach a channel you watch

Downtime notifications go to email and Slack so the right people see them within moments, not hours.

Alerts fire on 'up but broken' too

Because checks render the page, you are alerted to blank pages, script errors, and failed journeys — not only full outages.

Each alert says why

The notification names the cause — SSL, DNS, navigation error, failed flow — so you can act immediately.

Customers get a status page

A public status page keeps visitors informed during an incident and reduces inbound support load.

Best practices for downtime alerts

A few choices make alerts fast, trustworthy, and actionable.

What to alert on, ranked by what it costs you

"The site is down" is the easiest alert to set up and rarely the most expensive failure. This is the order most businesses regret not having.

AlertCatchesTypical cost of missing it
Checkout or signup journey failsA real purchase or registration cannot be completedRevenue, per hour, with no visible symptom
Form submission failsLeads stop arriving while the form still says thank youWeeks of lost enquiries before anyone notices
Site downServer or DNS failureObvious, and usually already monitored
SSL expiry approachingA certificate about to lapseA full-page browser warning for every visitor
Health score drops on a key pageA blank page, broken resources or a slow load after an update or a content editConversion loss that looks like a bad week
JavaScript errors on a key pageA dead button or a half-loaded pageSilent, and usually reported by a customer
Page health dropBlank pages, broken resources, failed API callsSlow decline nobody attributes to a deploy

Down is the easy half

Alerting on downtime is a solved problem: pick any monitoring tool, add a URL, choose a channel. If that is all you have, you are covered for the failure that announces itself and blind to the ones that do not.

The failures that cost money keep returning HTTP 200. A payment method removed by a plugin update, a form whose mail delivery stopped, a checkout step that throws a JavaScript error on mobile only — the server is healthy throughout, so no downtime alert ever fires. Catching those means running the flow itself on a schedule, which is what journey monitoring does.

Conclusion

Detecting downtime is only half the job; the alert is what makes it matter. Fast, accurate notifications through a channel your team watches turn monitoring into real reductions in downtime and lost revenue.

NorthDuty alerts you when a configured check detects a failure, with the result attached so your team can investigate. Email is included on Free; paid plans add Slack and other channels.

Related NorthDuty Pages

Keep exploring the feature pages and commercial routes connected to this topic.

Related reading

More NorthDuty guides on related website monitoring topics.

Frequently Asked Questions

Short answers that summarize the practical takeaways from this guide.

What should I alert on besides downtime?

The flows that make money: checkout, signup, login and your main form, run as real-browser journeys. Then SSL expiry, JavaScript errors and page-health drops on key pages. All of those fail while the site returns HTTP 200, so no downtime alert will fire.

How do I get alerted when my website goes down?

Use a monitoring tool that checks your site on a schedule and notifies you when a check fails. NorthDuty sends downtime alerts to email, Slack, and more, with the specific failure reason included.

How fast will I know about downtime?

It depends on your check frequency. NorthDuty checks as often as every minute on paid plans (every 5 minutes on the free plan), so alerts fire shortly after a failure occurs.

Can I get alerts in Slack?

Yes. NorthDuty can send alerts to Slack and other channels in addition to email, so downtime reaches a place your team actively watches.

How do I avoid false or noisy alerts?

Choose a tool with accurate, rendered checks and clear failure reasons, route alerts to the right channel, and tune them over time. NorthDuty's checks and reason codes are designed to keep alerts trustworthy.

Start monitoring your website with NorthDuty today.

Set up scheduled checks and an alert destination. NorthDuty notifies your team when a configured check detects a failure, with the result attached.

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