Website Monitoring for Developers
Stop Finding Out About Website Problems From Your Clients
A 200 response doesn't mean everything on the page works. Expiroo checks uptime, SSL, DNS, dependencies, and page content automatically across every site you maintain, and puts the results where you can pipe them into your own tools, not just an inbox.
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Manual checks don't scale past a handful of sites
A developer maintaining 20 websites can't reload each one every morning and call it monitoring. Instead the problem usually surfaces as a message from a client: the site's down, the checkout page is broken, or a browser is suddenly warning visitors about the certificate. By the time that message arrives, it's often already been broken for hours.
Expiroo runs the same checks a developer would run by hand, on a schedule, across every site, and keeps the result in one dashboard instead of a mental list of "sites I should probably check on this week."
Six checks, not just a ping
Availability alone doesn't guarantee every part of a page is actually working, these six checks cover the gap.
Uptime
A request every few minutes confirms the site actually responds, not just that DNS resolves. A 429 counts as up, since a server that's answering, even while rate-limiting, isn't down.
SSL certificates
Expiry date and issuer read from a real TLS handshake against the server, not a third-party lookup service.
DNS records
A, AAAA, MX, TXT, NS, CNAME, and CAA tracked. Nameserver, mail-routing, and certificate-authority changes are flagged specifically, since those are the actual hijack vectors, an A record rotating for load balancing isn't.
Dependency monitoring
Every script, stylesheet, font, and API call a page loads, checked individually, so a broken CDN or third-party API doesn't hide behind a normal HTTP response from your own server.
Keyword monitoring
Confirms an expected string is still present on the page, catching a response that's technically successful but actually an error page, a maintenance placeholder, or a defaced site.
Domain expiry
WHOIS and RDAP-based expiration tracking with its own alert schedule, so a client's domain doesn't lapse over a missed registrar email.
Uptime isn't the same as "working"
A server can answer every request correctly while the checkout script fails to load from a CDN, a webhook handler starts throwing errors nobody's watching, or a client's marketing team publishes over the page you built. Website availability alone doesn't guarantee that every important component of a site is functioning, which is exactly why dependency and keyword monitoring exist as separate checks from uptime, not folded into it.
Keyword monitoring confirms a specific string is still on the page. Dependency monitoring checks every script, font, and API call the page loads on its own, so a single failing resource doesn't hide behind an otherwise healthy response.
Alerts that plug into what you already use
Domain expiry alerts fire on a fixed schedule, 90, 30, 14, 7, 3, and 1 day before expiry, by email on every plan, and by Telegram or a signed webhook on Pulse and Business. The webhook is HMAC-signed with a secret only you have, so you can verify a payload actually came from Expiroo before your own code acts on it, useful for routing alerts into whatever internal tooling or chat integration you've already built.
Uptime, SSL, DNS, dependency, and keyword checks run continuously in the background on the same schedule and their current status is always visible in your dashboard and check history, updated every few minutes, not just when you remember to look.
Add a site in under a minute
Add the URL
SSL is auto-detected and uptime checks begin right away, no agent or DNS change required.
Turn on the checks you need
Enable DNS, dependency, or keyword monitoring per site, matching what actually matters for that project.
Wire up your webhook
Point domain expiry alerts at your own endpoint and verify the signature, or use email and Telegram directly.
Also useful for developer work
Run a one-off check without an account: SSL Certificate Checker,DNS Lookup, or the Uptime Checker. See every alert channel, including signed webhooks, on Integrations, or get the full technical breakdown of what's checked on Website Monitoring & Alerts. Managing sites for clients rather than building them yourself? See website monitoring for agencies.
Frequently asked questions
What is website monitoring?
It's an automated, recurring check of whether a website and the things it depends on are working: website uptime monitoring (is it online), SSL monitoring (is the TLS certificate valid), domain expiration monitoring (is the domain still registered), DNS monitoring (have records changed), and whether the resources the page loads are still responding. It replaces manually reloading a site to see if it's still up.
Why should developers monitor the websites they build or maintain?
A site returning a normal HTTP status doesn't mean everything on the page works. A broken CDN, an expired certificate, or a DNS record someone changed without telling you can all sit underneath a 200 response. Monitoring catches those independently of whether the server itself is technically up.
Can developers monitor uptime and SSL certificates together?
Yes, both are on by default when you add a site. Uptime is checked every few minutes with a real request; SSL is read from an actual TLS handshake, so the expiry date and issuer shown are the real ones, not a cached estimate.
Can I monitor multiple websites from one account?
Yes, there's no per-site login or separate setup. Pulse covers up to 30 websites and Business has no limit, so a freelancer or small dev team can manage every site they maintain from one dashboard.
Can I get alerts into my own tools instead of just email?
Domain expiry alerts can go out as a signed webhook (HMAC-verified with your own secret) on Pulse and Business, so you can pipe them into whatever you already use to route notifications. Telegram is also available on those plans. Uptime, SSL, DNS, and dependency checks don't push a notification yet, their current status is always visible in your dashboard and check history, updated every few minutes.
Does website availability alone tell me a site is actually working?
No. A server can answer every request with a normal status code while a page's checkout script is broken, a font host is down, or its content has quietly changed. That's the specific gap dependency and keyword monitoring cover, uptime alone only tells you the server is reachable.
Monitor what you build, automatically
Every site you maintain, checked on a schedule, with alerts routed wherever your own tooling already lives.
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