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Acoustid API vs QR & Barcode

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

APIAcoustid APINEW—QR & BarcodeNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key may be required for productionFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Acoustid API vs QR & Barcode: common questions

Which is more reliable, Acoustid API or QR & Barcode?

On our scheduled checks, QR & Barcode leads on measured uptime — Acoustid API at —% versus QR & Barcode 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 Acoustid API and QR & Barcode need an API key?

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

Can I call Acoustid API and QR & Barcode from the browser?

Yes — both Acoustid API and QR & Barcode 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 Acoustid API and QR & Barcode free for commercial use?

Acoustid API has unclear commercial terms, and QR & Barcode 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.