shipapis
StarSubmit an APISubmit API

arcsecond.io vs SkyBiometry

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

APIarcsecond.ioNEW—SkyBiometryREACHABLE—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

arcsecond.io vs SkyBiometry: common questions

Which is more reliable, arcsecond.io or SkyBiometry?

On our scheduled checks, SkyBiometry leads on measured uptime — arcsecond.io at —% versus SkyBiometry 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 arcsecond.io and SkyBiometry need an API key?

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

Can I call arcsecond.io and SkyBiometry from the browser?

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

Are arcsecond.io and SkyBiometry free for commercial use?

arcsecond.io has unclear commercial terms, and SkyBiometry 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.