REST Countries vs xAI Grok API
Same instrument, two spec sheets — measured, not claimed.
REST Countries vs xAI Grok API: common questions
Which is more reliable, REST Countries or xAI Grok API?
On our scheduled checks, xAI Grok API leads on measured uptime — REST Countries at —% versus xAI Grok 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 xAI Grok API need an API key?
REST Countries needs no key, while xAI Grok 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 xAI Grok API from the browser?
Only REST Countries is browser-friendly — it returns CORS headers over HTTPS. xAI Grok API needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are REST Countries and xAI Grok API free for commercial use?
REST Countries allows commercial use on its free tier, and xAI Grok 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.