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Adoptium vs OpenQR

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

APIAdoptiumNEW—OpenQRNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — key may be required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Adoptium vs OpenQR: common questions

Which is more reliable, Adoptium or OpenQR?

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

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

Can I call Adoptium and OpenQR from the browser?

Yes — both Adoptium and OpenQR send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Adoptium and OpenQR free for commercial use?

Adoptium has unclear commercial terms, and OpenQR 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.