QR & Barcode vs SEO Score

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

Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms
P95 · ms
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?

On our scheduled checks, SEO Score leads on measured uptime — QR & Barcode at —% versus SEO Score at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

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.