shipapis
StarSubmit an APISubmit API

OpenQR vs RSQ API

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

APIOpenQRHEALTHY80RSQ APIHEALTHY91
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms1125783
P95 · ms28511387
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?

Both are neck-and-neck — OpenQR and RSQ API 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, OpenQR or RSQ API?

RSQ API has the lower median latency in our checks — OpenQR responds in 1125 ms versus RSQ API at 783 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 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.