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ValidEU API vs REST Countries

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

APIValidEU APIUNMONITORED—REST CountriesHEALTHY—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedMPL-2.0
Free tierFree tier — API key requiredUnlimited
Rate limitUnpublishedNone published
In directory since2026-07-052026-05-02
operationalpartialdownno data

ValidEU API vs REST Countries: common questions

Which is more reliable, ValidEU API or REST Countries?

Only REST Countries is on our probe schedule so far (—% uptime over 90 days). The other is catalogued but not yet live-checked, so we can't compare measured reliability head-to-head — check the uncovered API's own status page for now.

Do ValidEU API and REST Countries need an API key?

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

Can I call ValidEU API and REST Countries from the browser?

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

Are ValidEU API and REST Countries free for commercial use?

ValidEU API has unclear commercial terms, and REST Countries allows commercial use on its free tier. 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.