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ONS vs PermisAPI

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

APIONSNEW—PermisAPINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key may be required for production
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ONS vs PermisAPI: common questions

Which is more reliable, ONS or PermisAPI?

On our scheduled checks, PermisAPI leads on measured uptime — ONS at —% versus PermisAPI 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 ONS and PermisAPI need an API key?

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

Can I call ONS and PermisAPI from the browser?

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

Are ONS and PermisAPI free for commercial use?

ONS has unclear commercial terms, and PermisAPI 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.