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arcsecond.io vs Strictly Better API

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

APIarcsecond.ioNEW—Strictly Better APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

arcsecond.io vs Strictly Better API: common questions

Which is more reliable, arcsecond.io or Strictly Better API?

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

Neither needs a paid key — arcsecond.io is callable with no signup, and Strictly Better API is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call arcsecond.io and Strictly Better API from the browser?

Yes — both arcsecond.io and Strictly Better API 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 arcsecond.io and Strictly Better API free for commercial use?

arcsecond.io has unclear commercial terms, and Strictly Better 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.