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QR & Barcode vs SEO Score

Same instrument, two spec sheets — measured, not claimed.

APIQR & BarcodeHEALTHY91SEO ScoreHEALTHY91
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms722634
P95 · ms13441704
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

QR & Barcode vs SEO Score: common questions

Which is more reliable, QR & Barcode or SEO Score?

Both are neck-and-neck — QR & Barcode and SEO Score each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, QR & Barcode or SEO Score?

SEO Score has the lower median latency in our checks — QR & Barcode responds in 722 ms versus SEO Score at 634 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do QR & Barcode and SEO Score need an API key?

QR & Barcode needs no key, while SEO Score requires a free API key. If you want to start calling without signup, reach for QR & Barcode first.

Can I call QR & Barcode and SEO Score from the browser?

Only QR & Barcode is browser-friendly — it returns CORS headers over HTTPS. SEO Score needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are QR & Barcode and SEO Score free for commercial use?

QR & Barcode has unclear commercial terms, and SEO Score has unclear commercial terms. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.