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OCR.Space vs RSQ API

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

APIOCR.SpaceREACHABLE—RSQ APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSyesno
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

OCR.Space vs RSQ API: common questions

Which is more reliable, OCR.Space or RSQ API?

On our scheduled checks, RSQ API leads on measured uptime — OCR.Space 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 OCR.Space and RSQ API need an API key?

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

Can I call OCR.Space and RSQ API from the browser?

Only OCR.Space 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 OCR.Space and RSQ API free for commercial use?

OCR.Space 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.