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Website integrity monitoring

Your uptime dashboard is green. Your website is still broken.

Broken JS bundles, MIME mismatches, redirect loops, and host drift all return 200 OK. Sitewatch catches them, classifies the root cause across 10 cause families, and delivers stack-aware fix steps.

  • Asset fingerprinting: detects 404'd scripts, missing stylesheets, and MIME mismatches on every check
  • Root cause diagnosis: 10 cause families, confidence scoring up to 90%, fix steps for 23 stacks
  • Deploy hooks: instant checks after every ship via Vercel, Netlify, or GitHub Actions

Built for the failures uptime tools miss

Real incidents. Real evidence. Real fixes.

23 stacks detected

Auto-detects your tech stack from headers and HTML — fix steps are platform-specific.

10 cause families

Every failure classified — CDN misconfiguration, deployment artifact, redirect loop, and more.

6 alert channels

Slack, email, SMS, webhooks, PagerDuty, and Opsgenie. Reach the right person instantly.

Shareable incident reports

Send clients a public evidence link — failure type, affected assets, and timeline.

Deployment Artifact

What users saw

Blank page — main.a4f2c.js returned 404 after Vercel build.

What Sitewatch detected

Asset fingerprint diff flagged missing bundle. Cause family: Deployment Artifact. Confidence: 88%.

Why uptime tools missed it

Server returned 200 OK. Uptime tools saw a healthy response.

CDN Misconfiguration

What users saw

Checkout page rendered without styles — unstyled HTML.

What Sitewatch detected

checkout.css served with text/plain MIME type after CDN config change. Caught before any customer ticket.

Why uptime tools missed it

CSS file returned 200. Uptime tools don't check Content-Type headers.

Redirect Misconfiguration

What users saw

/pricing never loaded — browser showed ERR_TOO_MANY_REDIRECTS.

What Sitewatch detected

WordPress plugin created redirect loop. 301 → 301 → 301. Full chain captured in report.

Why uptime tools missed it

First hop returned 301 — a valid HTTP response. Uptime tools don't follow chains.

What uptime tools miss

Six failure types your uptime tool will never see

Every one of these returns 200 OK. Every one breaks the experience for your visitors. Uptime tools see a healthy server. Sitewatch sees the broken page.

Broken Assets

JS/CSS returning 404, 403, or empty after a deploy or CDN change.

Example

Vercel build changes bundle hash. main.a4f2c.js now 404s. Page loads blank.

Evidence surfaced

Asset URL, HTTP status, fingerprint diff from last good check.

MIME Type Mismatches

Wrong Content-Type header — browsers silently reject the resource.

Example

Cloudflare serves app.js as text/html. Chrome blocks it. No console error for users.

Evidence surfaced

Expected vs actual Content-Type, asset URL, response headers.

Redirect Failures

Loops, excessive chains, or wrong final destination.

Example

WordPress plugin redirects /checkout → /checkout → /checkout. ERR_TOO_MANY_REDIRECTS.

Evidence surfaced

Full redirect chain with status codes and final destination.

Host Drift

DNS or CDN pointing to the wrong origin after migration.

Example

Domain resolves to decommissioned server after AWS migration. Old site serves stale content.

Evidence surfaced

Resolved IP, server headers, content fingerprint mismatch vs baseline.

Non-HTML Responses

JSON error, XML, or empty body where your page should be.

Example

API gateway serves {"error":"unauthorized"} on your landing page URL.

Evidence surfaced

Response Content-Type, body preview, expected vs actual content.

Third-Party Script Failures

External dependencies silently break critical page functionality.

Example

Stripe.js CDN goes down. Checkout page loads, but payment form is invisible.

Evidence surfaced

Third-party URL, HTTP status, load failure type, affected page.

What happens when something breaks

From broken page to root cause in minutes

Every check fingerprints your assets, traces redirects, and validates responses. When something fails, here's what kicks in.

01

Check detects a failure

A scheduled check or deploy hook finds a broken asset, MIME mismatch, redirect loop, or missing page. 2-of-3 retry confirmation rules out transient blips.

02

Evidence is captured automatically

HTTP status codes, response headers, asset fingerprint diffs, redirect chains, and content snapshots — all collected before anything changes.

03

Root cause is classified

Failure sorted into one of 10 cause families (CDN Misconfiguration, Deployment Artifact, Redirect Misconfiguration, etc.) with confidence scoring up to 90%.

04

Your team gets fix-ready context

Stack-aware fix steps for your platform — "clear Cloudflare cache", "redeploy on Vercel", "revert WordPress plugin". Delivered via Slack, email, SMS, webhooks, PagerDuty, or Opsgenie.

Beyond uptime

What makes this different from your current monitoring

Uptime tools check if your server responds. Sitewatch checks if your page actually works.

Catches what 200 OK hides

  • Broken assets, MIME mismatches, and redirect loops go unnoticed
  • Post-deploy breakage invisible until users complain
Fingerprints every asset on every check. A 404 script, a wrong Content-Type, a redirect loop — all caught automatically, even though the server says everything is fine.

Tells you why it broke

  • Alerts say "something is wrong" with no context on why
  • Fix steps are generic — they don't account for your actual tech stack
Every failure classified into one of 10 cause families with confidence scoring up to 90%. Fix steps are specific to your stack — Next.js, WordPress, Cloudflare, and 20 more.

Alerts only when it's real

  • Floods of alerts for the same underlying issue
  • Woken up at 3 AM for a transient blip
2-of-3 retry confirmation, fingerprint dedup, 30-minute cooldown, and configurable quiet hours. When Sitewatch alerts, it's a confirmed issue with evidence — not a transient blip.

One dashboard for every site

  • No way to tag or group sites by client — just a flat list of URLs
  • No single view of which client sites are healthy and which need attention
Tag sites by client, filter in one click, see per-client health at a glance. Know which accounts need attention without checking each one.

Use cases

Built for teams who ship fast and manage many sites

Agencies managing client portfolios. Teams deploying daily. Anyone who can't afford to find out about breakage from a customer email.

Website monitoring for agencies

Managing dozens of client websites means dozens of potential failure points. Sitewatch gives your team a single dashboard to monitor every client site — with automatic website checks that catch broken assets, failed redirects, and silent errors before they reach your clients.

  • Know about broken client sites before your clients do
  • Tag sites by client and see per-client health at a glance
  • Prove your value with automated branded reports
  • Catch broken links, broken assets, and silent failures
Learn more about agency monitoring

Detect broken assets & silent failures

Broken JavaScript files, missing stylesheets, and 404 errors silently degrade user experience and conversions. Sitewatch fingerprints every critical asset on your pages and detects changes, removals, and failures automatically.

  • Asset fingerprinting catches hash mismatches after deploys
  • Deploy hooks trigger instant checks after every ship
  • Detect broken JS/CSS, missing images, and 404 errors
  • Evidence-rich reports show exactly what changed and when
Learn more about asset monitoring

API & endpoint monitoring

Your website relies on APIs that can return errors or silently change their response structure. Sitewatch monitors your API endpoints for status code failures, response validation issues, and payload structure changes — so you catch backend problems before they break the frontend.

  • Validate API response status codes and payload structure
  • JSONPath matching to verify critical response fields
  • Configurable severity thresholds and alert channels
Learn more about API monitoring

Post-deploy verification

Hook into Vercel, Netlify, or GitHub Actions. Every deploy triggers an immediate website check. If something breaks, get automatic root cause classification with fix steps for your stack.

  • Webhook integration with 4 CI/CD platforms
  • Configurable CDN propagation delay
  • Root cause playbooks with every incident
Learn more about deploy hooks

Uptime monitoring vs Sitewatch

You probably already have uptime monitoring. Here's what it misses.

Uptime tools
Sitewatch
What's checked
Server responds with 200
Every asset loads, MIME types match, redirects resolve, content renders
What alerts contain
"Site down" with a status code
Failure type, affected assets, evidence chain, and root cause classification
False positive handling
Single-check alerts — transient blips trigger pages
2-of-3 retry confirmation, fingerprint dedup, 30-minute cooldown
Fix guidance
None — you investigate from scratch
Stack-aware fix steps for 23 platforms ("clear Cloudflare cache", "redeploy on Vercel")

Pricing

Simple, transparent pricing

Start monitoring in minutes. No credit card required. Upgrade as you grow.

Monthly Annual 2 months free

Free

Monitor your own projects for free.

$0/month
  • 1 site monitored
  • 30-min integrity checks
  • 5-min ping checks
  • All 11 detection rules
  • Root cause diagnosis
  • Email alerts
  • 7-day data retention
Start free

Starter

Everything you need to monitor client sites.

$9/month

7-day free trial

  • 25 sites monitored
  • 15-min integrity checks
  • 5-min ping checks
  • 5 API endpoint monitors
  • Email, Slack & webhook alerts
  • Monthly auto-reports
  • Root cause playbooks
  • 3 deploy hooks (50/day)
  • 1 public status page
  • 5 team members
  • 30-day data retention
Get Starter
Most popular

Pro

Built for agencies managing 50+ client sites.

$19/month

7-day free trial

Everything in Starter, plus:

  • 100 sites monitored
  • 5-min integrity checks
  • 25 API endpoint monitors
  • Multi-region checks (EU + US)
  • All 6 alert channels (incl. PagerDuty, Opsgenie, SMS)
  • Weekly + monthly auto-reports
  • Stack-aware playbooks (23 stacks)
  • 10 deploy hooks (200/day)
  • Branded status pages (password-protected)
  • Bundle reports (PDF + email)
  • 20 team members
  • 90-day data retention
Start with Pro

FAQ

Frequently asked questions

Everything you need to know about Sitewatch and website monitoring.

Your uptime monitor says everything is fine.

Your visitors disagree. Start monitoring what actually matters in minutes.

Free plan available. No credit card required.