Uptime Monitoring for SEO
Free website uptime monitoring, built for SEO. RankNibbler checks your site's real server response on a schedule, tracks its uptime and response time, and tells you when it goes down. Because when your site is down, Googlebot can't crawl it — and repeated downtime quietly costs you rankings.
Why uptime matters for SEO
Downtime isn't only a user-experience problem — it's a crawl and indexing problem. When Googlebot repeatedly hits 5xx errors or timeouts, it backs off and slows its crawl rate to avoid hammering a struggling server, so your new and updated pages are discovered and re-indexed more slowly.
If the errors persist, the cost goes up. Prolonged downtime — on the order of a couple of days of server errors — can cause Google to drop the affected pages from its index until they recover. The damage depends entirely on how you go down:
- A 503 Service Unavailable with a Retry-After header is the correct, low-risk way to signal short, planned maintenance — Google understands it and comes back.
- An unhandled 500, a connection timeout, or a DNS failure is the damaging kind: it looks like a broken site, not a paused one.
The point of monitoring is to catch an outage early — before a crawl happens to coincide with it — and to know whether a real problem or a one-off blip caused it.
How RankNibbler's uptime monitoring works
Add a URL and choose how often to check it: every 5, 15, 30 or 60 minutes. Each check is a direct HTTP request that measures the real server response time — there's no proxy in the path, so the timing you see is your server's, not ours.
The up/down rules are deliberately transparent, so you always know what an incident means:
- Up — the site returns an HTTP 2xx or 3xx.
- Down — a 4xx or 5xx response, a 10-second timeout, or a connection, DNS or SSL/TLS error.
Accurate alerts you can trust
RankNibbler is built to be accurate, so when it tells you something's wrong, it's worth acting on:
- Confirmed before it counts. A check that fails is re-run a couple of times to confirm a genuine outage before it's recorded — so a momentary blip is filtered out, not flagged.
- Bot-protection smart. When a check meets Cloudflare-style protection (a 403, 429 or 503), RankNibbler re-verifies through a real browser and correctly reads a guarded-but-healthy site as up.
How to set up uptime monitoring
You can have a monitor running in under a minute.
1. Open Uptime Monitoring and add a monitor
In your dashboard, open Uptime monitoring and click Add monitor. Enter the URL you want to watch, choose how often to check it — every 5, 15, 30 or 60 minutes — and tick Email me if it goes down if you'd like alerts.
2. Watch your sites from the dashboard
Every monitor shows its live status, 24-hour uptime, last response time and check interval, and the page refreshes on its own — so it works as a status board for all your sites at once.
3. Open a monitor for the full history
Click View on any monitor for the detail: current status, average response time, an uptime history strip and a response-time chart across the last 24 hours, 7 days, 30 days or all time — plus a log of every check with its status code and timing.
Downtime alerts
When you create a monitor you can opt in to an email alert when it goes down — and again when it comes back up, so you're not glued to the dashboard to know your site's healthy.
Frequently asked questions
Does website downtime affect SEO?
Yes. Short blips are usually harmless, but repeated 5xx errors make Googlebot slow its crawl rate, and prolonged downtime (around two days of server errors) can drop affected pages from Google's index until the site recovers.
How often does RankNibbler check my site?
On a schedule you choose: every 5, 15, 30 or 60 minutes.
What counts as "down"?
A 4xx or 5xx response, a 10-second timeout, or a connection, DNS or SSL/TLS error. An HTTP 2xx or 3xx counts as up.
Why do other monitors report my site as down when it's actually up?
Bot protection such as Cloudflare returns a 403, 429 or 503 to automated checks. RankNibbler re-confirms those through a real browser, so a healthy but bot-guarded site isn't falsely flagged down.
What is a good uptime percentage?
99.9% ("three nines") is the common baseline — about nine hours of downtime a year. Ecommerce and SaaS sites usually aim higher.
Does it measure response time?
Yes. Every check records your server's real response time, with last and average values and a response-time chart.
Will I be alerted if my site goes down?
Optionally, yes — you can have an email sent when a monitor goes down and again when it recovers.
Is RankNibbler's uptime monitoring free?
Yes. It's free and part of the wider RankNibbler SEO toolset.
Start monitoring your site
Add your first monitor in under a minute — it's free, and it sits alongside the rest of your SEO tools.