What is uptime monitoring?

Uptime monitoring is the practice of automatically checking, around the clock, whether your website or server is reachable, and alerting you the moment it stops responding.

How it works

An uptime monitor sends a request to your site at a fixed interval, often every minute or every five minutes, from a server somewhere on the internet. It then looks at the response:

• If the site answers with a normal status code in time, it is marked up.
• If the request times out, is refused, or returns an error, the site is marked down.

Good monitors confirm a failure with a second check before alerting you, so a single network blip does not trigger a false alarm.

Why it matters

Every minute your site is down costs you visitors, sales, and trust, and you usually find out last. Uptime monitoring flips that around: you get an email within a minute or two of an outage, often before your customers notice.

It also gives you a record. Over weeks and months you can see your real uptime percentage, spot patterns, and hold your hosting provider accountable.

What to look for

• Frequent checks so outages are caught quickly.
• Confirmation before alerting to avoid false positives.
• A clear history of past incidents and uptime.
• Simple setup. You should be monitoring within a couple of minutes.

Uptime monitoring is one of the cheapest forms of insurance for anything you run online. If you have a website worth visiting, it is worth watching.