REST Countries vs WhoisXML API IP Geolocation API
Same instrument, two spec sheets — measured, not claimed.
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, WhoisXML API IP Geolocation API leads on measured uptime — REST Countries at —% versus WhoisXML API IP Geolocation 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 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?
Yes — both REST Countries and WhoisXML API IP Geolocation API send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.
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.