Shopify hosts the store. We watch everything around it.
Shopify gives you a fast, secure storefront. It doesn't give you DNS drift detection, WHOIS expiry alerts on the custom domain, synthetic checkout tests, or daily SEO health checks. That gap is where Pleenx fits.
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Shopify is best-in-class at uptime, CDN, and platform SSL. Pleenx isn't trying to monitor Shopify itself — we're watching the boring failure modes around the storefront: the client's custom domain expiry, DNS records pointing at Shopify correctly, the checkout funnel staying intact after a theme update, and the email reputation of the sending domain. Stuff Shopify can't and shouldn't watch for you.
What actually breaks on Shopify sites.
Custom domain expired — store goes dark
Shopify hosts the store, but the client owns the domain at a separate registrar. When auto-renewal fails, the store is unreachable until you notice and renew.
DNS pointing at wrong Shopify shop
After a re-platform or shop transfer, the A record still points at the old Shopify IP. Customers hit a 404. Daily DNS probe catches it same-morning.
Checkout broke after a theme update
Custom Liquid in the theme references a deprecated tag. Add-to-cart button silently fails for one variant. Synthetic probe runs the full checkout flow daily.
Order confirmation emails landing in spam
Custom sending domain (orders@yourbrand.com) lacks proper SPF/DKIM. Customers report 'I didn't get my order email' to support, you spend a day debugging.
noindex shipped to product page
Theme template was edited in staging, robots meta set to noindex, then pushed to live. Product disappears from Google for the time it takes you to notice.
Core Web Vitals tanked after app install
New reviews app added 4 third-party scripts that block main thread. INP regresses, Google reports degraded CWV. Daily PSI probe catches the trend.
What we run daily, in priority order for Shopify.
- /01/whoisCustom domain WHOIS / RDAP expiry
Shopify doesn't own the client's domain
- /02/dnsDNS A · CNAME on www · TXT verifications
Catches mispointed records after re-platforming
- /03/sslTLS handshake on the custom domain
Shopify auto-provisions but renewal can fail on DNS edge cases
- /04/httpHTTP uptime + redirect chain
Catches infinite-redirect loops after subdomain config changes
- /05/syntheticCheckout / add-to-cart synthetic
Highest-impact monitor for any Shopify storefront
- /06/email-authSPF · DKIM · DMARC for sending domain
Catches order-email deliverability drift
- /07/cwvCore Web Vitals (LCP / INP / CLS)
Third-party app installs frequently regress CWV
“We migrated three Shopify Plus clients to a unified monitoring stack last quarter. Pleenx caught a custom-domain DNS issue the same morning the host migrated — the client thanked us instead of complaining.”
— Composite voice from early-access Shopify partner feedback
Deeper on monitoring for Shopify.
DNS for agencies: A, AAAA, MX, NS, TXT explained without the BIND manual
Practical DNS reference for agency operators — what each record type does, how it actually breaks in client portfolios, and the change-detection patterns that catch hijacks and accidental drift.
7 min · dns · securityDNS hijack detection for agencies: how it happens and what catches it
DNS hijacks rarely look like Hollywood hacks — they're stolen registrar logins, expired domains repurposed, or a junior dev hitting the wrong button. Real attack patterns + practical detection.
9 min · cwv · performanceCore Web Vitals for agencies: LCP, INP, CLS without the marketing rebrand
CWV affects Google rankings, but most of what gets sold to clients as 'page speed optimization' addresses metrics that don't matter. Here's what each CWV actually measures and what to fix.
First probe on your first Shopify site in 30 seconds.
Magic-link sign-in. Add a hostname, watch the first probe run. 25 domains free for 14 days. Cancel anytime.