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arcsecond.io vs OpenAI API

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

APIarcsecond.ioDEAD0OpenAI APIDEAD0
Uptime · 30d
Uptime · 90d57.2%0.0%
Uptime · 30d0.0%0.0%
P50 · ms503—
P95 · ms1489—
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedRetry-After: 109s
In directory since2026-07-052026-07-05
operationalpartialdownno data

arcsecond.io vs OpenAI API: common questions

Which is more reliable, arcsecond.io or OpenAI API?

On our scheduled checks, arcsecond.io leads on measured uptime — arcsecond.io at 57.2% versus OpenAI API at 0.0% 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 OpenAI API need an API key?

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

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

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

Are arcsecond.io and OpenAI API free for commercial use?

arcsecond.io has unclear commercial terms, and OpenAI 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.