Transaction Monitoring
Your checkout and signup pages fail silently. Know when they break.
Signups, logins, checkouts, and bookings depend on dozens of scripts and assets. When one fails, the transaction breaks -- but the page still loads fine. Sitewatch monitors the dependencies that revenue-critical flows rely on, so you catch the #1 cause of broken transactions: missing or broken scripts and assets.
- Catch checkout failures from broken payment scripts and missing JS bundles
- Detect signup and login breakage before users start complaining
- Get alerted with the exact script, status code, and affected page
Transaction flow failure detected
Affected flows
- checkout-bundle.min.js — 404 Not Foundjust now
- js.stripe.com/v3 — MIME type mismatch (text/html)just now
- recaptcha/api.js — 503 Service Unavailable1m ago
- auth0-spa.js — 200 OK, application/javascript1m ago
01The monitoring gap
Uptime tools vs. transaction monitoring
| Scenario | Uptime tools | Sitewatch |
|---|---|---|
| Checkout scripts | Not checked | Every payment script verified as present and usable |
| Auth dependencies | Invisible | Login, SSO, and signup scripts validated each check |
| Search components | Outside scope | Search and filter scripts verified per page |
| Third-party providers | Ignored | Stripe, Auth0, reCAPTCHA, Algolia -- all checked |
| Post-deploy verification | A ping says the server answered | Full dependency scan after every deploy |
| Failure evidence | Up or down | The exact file, what went wrong, and the page it affects |
Checkout scripts
- Uptime tools:
- Not checked
- Sitewatch:
- Every payment script verified as present and usable
Auth dependencies
- Uptime tools:
- Invisible
- Sitewatch:
- Login, SSO, and signup scripts validated each check
Search components
- Uptime tools:
- Outside scope
- Sitewatch:
- Search and filter scripts verified per page
Third-party providers
- Uptime tools:
- Ignored
- Sitewatch:
- Stripe, Auth0, reCAPTCHA, Algolia -- all checked
Post-deploy verification
- Uptime tools:
- A ping says the server answered
- Sitewatch:
- Full dependency scan after every deploy
Failure evidence
- Uptime tools:
- Up or down
- Sitewatch:
- The exact file, what went wrong, and the page it affects
02Revenue at stake
Every broken flow is lost revenue
Checkout failures
A broken Stripe script or missing checkout bundle means zero completed purchases. Your product pages load fine, but the money stops flowing.
Signup breakage
Authentication scripts, validation libraries, and form handlers can all fail independently. Your signup page renders, but new users cannot create accounts.
Login failures
When SSO scripts, auth providers, or session handlers break, existing users get locked out. Support tickets pile up while you hunt for the cause.
Search that returns nothing
Autocomplete scripts, search index connectors, and filter components can 404 after a deploy. Users see an empty search bar and leave.
Booking flows that stall
Calendar widgets, availability checkers, and reservation scripts are complex dependency chains. One missing asset and the entire booking flow dies.
Lead-gen forms that ghost
Contact forms, demo requests, and quote builders depend on scripts your uptime tool never checks. Visitors fill them out, hit submit, and nothing happens.
03Where a sale breaks
Every step between interest and payment.
A transaction is a chain, and it only takes one broken link. Select a step to see how it fails — and how Sitewatch catches it.
vendor
The payment provider
✕How it fails
Stripe, PayPal or Adyen stops loading, so the payment form never appears.
✓How Sitewatch detects it
Checks every third-party script the checkout loads, on infrastructure you do not control.
The product page
entryHow it fails — Images or the add-to-cart button fail to load, so the journey never starts.
How Sitewatch detects it — Verifies the page and every file it needs on each check.
The cart
stateHow it fails — The cart script fails and items silently never get added, with no error shown.
How Sitewatch detects it — Confirms the scripts the cart depends on are present and usable.
The payment provider
vendorHow it fails — Stripe, PayPal or Adyen stops loading, so the payment form never appears.
How Sitewatch detects it — Checks every third-party script the checkout loads, on infrastructure you do not control.
The confirmation
completionHow it fails — The final step errors after payment, leaving customers unsure whether they were charged.
How Sitewatch detects it — Monitors the confirmation step as its own critical page.
04Silent failure modes
How transaction flows break silently
Payment & checkout
- Stripe, PayPal, or Braintree scripts returning 404 after CDN changes
- Checkout scripts arriving as the wrong kind of file
- Cart and payment form CSS missing, rendering unusable inputs
- Price calculation scripts failing to load from third-party CDNs
Authentication & signup
- Auth0, Firebase Auth, or SSO provider scripts returning errors
- reCAPTCHA and bot-protection scripts going down
- Signup form validation libraries failing to load
- OAuth and social login widget scripts blocked by CORS or redirects
Search & navigation
- Algolia, Elasticsearch, or custom search scripts returning errors
- Autocomplete and filter component bundles missing after deploys
- Navigation menu scripts 404-ing, breaking site-wide UX
- Booking widget and calendar component dependencies failing
05How it works
How Sitewatch monitors transaction dependencies
- 01
Add your transaction pages
Point Sitewatch at your checkout, signup, login, and search pages. Each URL is fetched and parsed to discover every script and asset the page depends on.
- 02
Verify every dependency
Every script, stylesheet and third-party file the page needs is requested and checked, to confirm each one is really there and arrives as the right kind of file.
- 03
Confirm with retries
Detected failures go through 2-of-3 retry confirmation. Only persistent issues create an incident -- transient CDN hiccups don't trigger false alerts.
- 04
Alert with evidence
When a script your checkout depends on fails, you get a Slack or email alert naming the exact file, what went wrong and which pape, and which transaction page is affected.
06What you get
Outcomes, not a feature list.
Know the moment customers stop being able to pay.
Checkout, signup, login and booking all lean on scripts you do not control. When one of them stops loading, the page still looks perfect and the flow silently stops working. Sitewatch checks those dependencies on every visit.
Every dependency
Scripts and assets verified per flow
2-of-3
Retry confirmation before alerting
6 channels
Alert channels with full evidence
How much revenue did a broken checkout cost you last quarter?
Find out what's broken right now. Free plan, no credit card required.
07FAQ
Frequently asked questions
No. Sitewatch monitors the scripts and assets that transaction flows depend on -- payment processors, auth libraries, form handlers, and search components. It does not click through multi-step flows in a browser. Instead, it catches the #1 cause of broken transactions: missing or broken scripts and assets that silently disable the flow while the page still loads.
Sitewatch checks the dependencies behind checkout, signup, login, search, booking, and lead-gen flows. Any page you add gets a full dependency scan: every JavaScript bundle, stylesheet and third-party script is checked to confirm it is there and is the right kind of file.
Uptime tools check whether your server answers. Your checkout page can answer perfectly while the Stripe script behind it is 404-ing and no one can pay. Transaction monitoring verifies the specific scripts and assets that each flow depends on -- the layer between "site is up" and "users can actually transact."
Sitewatch checks as frequently as every 5 minutes on Pro, or every 30 minutes on Free. You can also trigger on-demand checks from the dashboard or via deploy hooks. When a confirmed failure is detected, alerts go to your configured channels immediately with the exact script URL, status code, and affected page.
Yes. Sitewatch checks every script referenced in your page HTML, including third-party providers like Stripe, PayPal, Auth0, Firebase, reCAPTCHA and Algolia. If any of them error, arrive as the wrong kind of file, or redirect to an error page, you get an alert with full details.
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