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REST Countries vs WhoisXML API IP Geolocation API

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

APIREST CountriesHEALTHY96WhoisXML API IP Geolocation APIDEAD0
Uptime · 30d
Uptime · 90d100%0.0%
Uptime · 30d100%0.0%
P50 · ms328—
P95 · ms1189—
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licenseMPL-2.0Unverified
Free tierUnlimitedFree tier — API key required
Rate limitNone publishedUnpublished
In directory since2026-05-022026-07-05
operationalpartialdownno data

REST Countries vs WhoisXML API IP Geolocation API: common questions

Which is more reliable, REST Countries or WhoisXML API IP Geolocation API?

On our scheduled checks, REST Countries leads on measured uptime — REST Countries at 100% versus WhoisXML API IP Geolocation 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 REST Countries and WhoisXML API IP Geolocation API need an API key?

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

Can I call REST Countries and WhoisXML API IP Geolocation API from the browser?

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

Are REST Countries and WhoisXML API IP Geolocation API free for commercial use?

REST Countries allows commercial use on its free tier, and WhoisXML API IP Geolocation 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.