Up isn't the same
as working.
Your uptime monitor says 200 OK while orders stop, signups flatline, and payments quietly fail. ismysiteup watches the numbers that actually run your business — and tells you the moment they break.
Free forever plan · No credit card · Set up in 60 seconds
While you're here — is your site up right now?
Free 5 checks per hour. Sign up for 24/7 automated monitoring.
The failures nobody catches
A green status page is a lie your users don't believe. The checkout that 500s after payment. The signup form that silently drops. The webhook that stopped firing at 3am. Your server says "up" — your business says otherwise. Those are the failures uptime tools miss, because the page still loads. ismysiteup watches the values behind your app, not just the front door, and pings you the second one breaks — so you're fixing it before anyone else notices.
Three steps, sixty seconds
From paste to protected in under a minute.
Point us at a URL or API
Paste a link or pick a saved endpoint. That's the whole setup for a basic check.
Tell us what 'working' means
A 200 status, a fast response, or a value in the JSON — orders, signups, balance — that should never stall.
Get back to work
We check around the clock and only interrupt you when something's actually wrong.
What you get
One tool for both questions: is it up, and is it actually working?
Data Monitors — catch the failures that still return 200
Your checkout can 500 after payment. Signups can silently drop. A webhook can stop firing at 3am while every status page stays green. Data Monitors watch the real values in your API — orders, signups, revenue, queue depth — and alert you the moment they stall or move the wrong way. That's the failure a ping check will never see.
Uptime monitoring that actually reaches you
We check your sites around the clock and send the alert the moment one goes down — not five minutes later. Response time and status code included.
API Client & endpoint tests
A built-in API client to build and save requests, plus scheduled endpoint tests with assertions — set what “healthy” means and get alerted the moment an endpoint fails, right alongside your uptime and data alerts.
Alerts on WhatsApp, Telegram, Slack & email
We ping the apps already in your hand, so you actually see it. Connect your own channels once — every channel, on every plan, including free.
Catches problems, not just outages
SSL expiry, domain-name expiry, and slow responses get flagged early — with reminders in the days and hours before your domain lapses, so none become a 2am emergency.
Built for people juggling many sites
Group monitors by client or project, see everything at a glance, and never lose track of which site belongs to whom.
A free plan you can actually use
One Data Monitor, five uptime checks, real alerts, no credit card, no 14-day countdown. Start free and stay free until you outgrow it.
See the difference a Data Monitor makes
Same moment, same site. One check shrugs; the other saves your afternoon. Point us at any endpoint, pick a value that should never stall, and we watch it — no CI pipeline, no monitoring degree.
Uptime check
200 OK · 180ms ✓
"Looks fine." Nobody gets paged.
Data Monitor
orders/hour: 42 → 0 🔴
Alert fires. You fix it before the client emails.
Included free — no credit card.
Look like the one who's always watching
When you message a client "we spotted an issue and we're on it" before they've even noticed, you stop looking like the person who broke something and start looking like the person who never misses anything. Group every site and API by client, watch it all from one dashboard, and let the alerts make you look sharp. That's what this tool actually sells: not uptime — your reputation.
Simple pricing. Start free.
Every plan watches your business, not just your server. Upgrade when one monitor isn't enough.
Pro
- 10 Data Monitors
- 50 uptime monitors
- API Client & endpoint tests
- All alert channels, no ads
Business
- 50 Data Monitors
- 200 uptime monitors
- API Client & endpoint tests
- All alert channels, no ads
Frequently asked questions
The honest answers, before you sign up.
What's a Data Monitor, and why should I care?
It watches an actual value in your API — order count, signups, revenue, queue depth — and alerts you when it stalls or moves the wrong way. That's the failure uptime checks miss: the page returns 200 while the business quietly stops. Uptime tells you the door is open; a Data Monitor tells you people are still walking through it.
Isn't uptime monitoring enough?
It catches the site being down — which matters — but not the checkout that 500s after payment, the signup that silently drops, or the webhook that stopped firing at 3am. Those all return a healthy status while your revenue flatlines. You want both, and you get both here.
Is the free plan really free?
Yes. No card, no trial clock. One Data Monitor, five uptime monitors, and real alerts via WhatsApp, Telegram, Slack, or email — indefinitely.
How fast will I know when something breaks?
The first alert fires the moment a check fails — not on the next cycle. After that we batch follow-ups so a flapping site can't spam you, then tell you again the instant it recovers.
Do I need my own WhatsApp or Slack setup?
You connect your own channels once — WhatsApp via CallMeBot, Telegram and Slack in a couple of clicks. After that, alerts flow straight to you at no per-message cost from us, on every plan.
Can I monitor sites and APIs I manage for clients?
That's exactly who this is built for. Group everything by client or project, watch it from one dashboard, and message them 'we spotted it and we're on it' before they've even noticed.