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Urlbox API vs Warnely

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

APIUrlbox APIDEAD0WarnelyDYING89
Uptime · 30d
Uptime · 90d0.0%90.2%
Uptime · 30d0.0%83.3%
P50 · ms—334
P95 · ms—1375
AuthapiKeynone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublished100 req/window · 99 remaining · resets 60
In directory since2026-07-052026-07-05
operationalpartialdownno data

Urlbox API vs Warnely: common questions

Which is more reliable, Urlbox API or Warnely?

On our scheduled checks, Warnely leads on measured uptime — Urlbox API at 0.0% versus Warnely at 90.2% 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 Urlbox API and Warnely need an API key?

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

Can I call Urlbox API and Warnely from the browser?

Neither sends browser-friendly CORS headers reliably, so call Urlbox API and Warnely from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Urlbox API and Warnely free for commercial use?

Urlbox API has unclear commercial terms, and Warnely 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.