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
All systems operational
Recent activity
All systems operational
Recent activity
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.
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.
Evidence is captured automatically
HTTP status codes, response headers, asset fingerprint diffs, redirect chains, and content snapshots — all collected before anything changes.
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%.
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
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
Alerts only when it's real
- Floods of alerts for the same underlying issue
- Woken up at 3 AM for 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
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
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
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
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
Uptime monitoring vs Sitewatch
You probably already have uptime monitoring. Here's what it misses.
Pricing
Simple, transparent pricing
Start monitoring in minutes. No credit card required. Upgrade as you grow.
Free
Monitor your own projects for free.
- 1 site monitored
- 30-min integrity checks
- 5-min ping checks
- All 11 detection rules
- Root cause diagnosis
- Email alerts
- 7-day data retention
Starter
Everything you need to monitor client sites.
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
Pro
Built for agencies managing 50+ client sites.
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
FAQ
Frequently asked questions
Everything you need to know about Sitewatch and website monitoring.
Uptime monitors only check if your server responds with a 200 status code. Sitewatch checks what actually loads on the page — broken JavaScript bundles, missing CSS files, failed API calls, and redirect loops can all happen while your server returns 200. We catch the failures that uptime tools miss.
Yes. Sitewatch fingerprints every JavaScript and CSS asset on your monitored pages. If a CDN goes down, a deploy breaks a bundle hash, or a third-party script returns a 404, we detect it within minutes and include the full evidence in your incident report.
Absolutely. Many websites rely on third-party scripts for analytics, chat widgets, payment forms, and more. Sitewatch monitors all assets loaded on your pages, including third-party resources, so you know immediately when an external dependency fails.
Sitewatch runs website checks on a configurable schedule — from every hour to daily. When an issue is detected, alerts are sent immediately via your configured channels. Email is available on all plans. Starter adds Slack and webhooks. Pro adds PagerDuty, Opsgenie, and SMS. Most teams receive their first alert within minutes of an issue appearing.
Yes. Our Pro plan includes multi-region monitoring so you can verify that your sites work correctly for users across different geographies. This is especially useful for catching CDN issues that only affect certain regions.
Each incident report includes the failure type, affected assets with full URLs, HTTP status codes, response time data, a timeline of when the issue was first detected and last seen, and comparison data showing what changed. Reports are shareable with clients via a unique link.
Yes. Every incident generates a shareable report with a unique URL. You can send these directly to clients to show exactly what happened, when it was detected, and what was affected — no login required for viewing.
Deploy hooks are webhooks you add to your CI/CD pipeline (Vercel, Netlify, GitHub Actions, or any platform that supports webhooks). When a deploy completes, the webhook triggers an immediate Sitewatch website check — so you know within seconds if something broke, instead of waiting for the next scheduled check.
When Sitewatch detects an issue, it automatically classifies the root cause into one of 10 cause families (like DNS resolution failure, CDN cache misconfiguration, or deployment artifact missing). Each classification includes a confidence score and evidence from the check. No configuration required — it works out of the box.
Sitewatch auto-detects 23 tech stacks including Next.js, Nuxt, Gatsby, WordPress, Shopify, Cloudflare, Vercel, Netlify, AWS CloudFront, Nginx, Apache, and more. When an issue is found, fix steps include platform-specific guidance — like clearing the Cloudflare cache or redeploying on Vercel.
You can click through a page and see if it looks right, but you can't see MIME mismatches by eye, you can't detect host drift from a browser tab, and you certainly can't check 50 sites every hour. Sitewatch verifies every linked asset's HTTP status and content type automatically — catching the silent failures that manual checks miss.
Hosting monitors infrastructure — server CPU, memory, and whether the process is running. They don't check whether your page actually works for visitors. A server returning 200 OK while serving broken JavaScript, missing stylesheets, or redirect loops is invisible to infrastructure monitoring. Sitewatch monitors the customer experience layer that hosting providers don't cover.
Your uptime monitor says everything is fine.
Your visitors disagree. Start monitoring what actually matters in minutes.
Free plan available. No credit card required.