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Urlbox API vs ValidEU API

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

APIUrlbox APINEW—ValidEU APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeyapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Urlbox API vs ValidEU API: common questions

Which is more reliable, Urlbox API or ValidEU API?

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

Both ask you to authenticate — Urlbox API uses an API key and ValidEU API uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call Urlbox API and ValidEU API from the browser?

Neither sends browser-friendly CORS headers reliably, so call Urlbox API and ValidEU API 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 ValidEU API free for commercial use?

Urlbox API has unclear commercial terms, and ValidEU 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.