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OpenQR vs RSQ API

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

APIOpenQRNEW—RSQ APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — key may be requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

OpenQR vs RSQ API: common questions

Which is more reliable, OpenQR or RSQ API?

On our scheduled checks, RSQ API leads on measured uptime — OpenQR at —% versus RSQ API 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 OpenQR and RSQ API need an API key?

RSQ API needs no key, while OpenQR requires a free API key. If you want to start calling without signup, reach for RSQ API first.

Can I call OpenQR and RSQ API from the browser?

Only OpenQR is browser-friendly — it returns CORS headers over HTTPS. RSQ API needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are OpenQR and RSQ API free for commercial use?

OpenQR has unclear commercial terms, and RSQ API 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.