Monitor
BigCommerce monitor for the Stencil-vs-Blueprint shopper-flow day, and the Stripe Payments webhook that quietly dropped an event.
A BigCommerce store rarely goes hard-down. It goes wrong-on-checkout because a Stencil theme update met a Stripe Payments webhook update and the cart page now answers in nine seconds while the webhook silently drops events. SiteGuardian watches the URLs a buyer types, on a minute cadence, before the next BigCommerce theme update tips /checkout above threshold.
- Watches your BigCommerce storefront, /cart, /checkout, and shopper login as separate URLs.
- Tight slow threshold on /checkout. 1.5 seconds is sane for most BigCommerce stores.
- Probes every minute on Pro. Fast enough to catch the day the Stripe Payments webhook stopped firing.
- SSL expiry alerts on every plan. BigCommerce-managed certs are not really managed.
- No BigCommerce app install, no Stencil theme edit, no Blueprint migration script.
How it works
Setup, in three beats.
Step 01
Add the URL a paying shopper types first
Paste your BigCommerce storefront root, /cart, /checkout, and the shopper login. Set a tight slow threshold on /checkout (1.5 seconds is sane) and a slightly looser one on /cart. SiteGuardian starts probing inside the next minute, no BigCommerce App Marketplace install required.
Step 02
Let the alerts catch the Stencil-update day
Most BigCommerce slowdowns come from a Stencil theme update, a heavier shopper-flow script, or a Stripe Payments webhook that started dropping events silently. The minute cadence catches the day the change happened, before BigCommerce’s conversion-rate drop shows up in your dashboard a week later.
Step 03
Catch the shopper-flow slowdown before the abandonment queue starts
A /checkout that returns 200 but takes nine seconds because a webhook-side script bloated is the worst kind of failure. SiteGuardian catches the same minute it happens, with one short email naming the URL, the new TTFB, and the prior-day baseline.
What the alert actually says
One email. One URL. One timestamp.
Your URL https://yourstore.mybigcommerce.com/checkout answered slowly at 9,120ms (your threshold is 1,500ms) at 14:32 UTC, immediately after a Stencil Cornerstone 5.2 publish.Frequently asked
The bigcommerce monitor questions, answered flat.
Frequently asked
Related reading
Keep exploring.
Try it
Start monitoring my site.
Starter is $19 a month — one site, ten URLs, every-five-minute checks. Pro is $39 a month — three sites, fifty URLs, every-minute checks. Lifetime is $299 paid once and stays yours with every future update included.
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