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Wikipedia REST vs xAI Grok API

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

APIWikipedia RESTHEALTHY—xAI Grok APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licenseCC BY-SA 4.0Unverified
Free tierUnlimited within etiquetteFree tier — API key required
Rate limit200/sec global courtesy capUnpublished
In directory since2026-05-092026-07-05
operationalpartialdownno data

Wikipedia REST vs xAI Grok API: common questions

Which is more reliable, Wikipedia REST or xAI Grok API?

On our scheduled checks, xAI Grok API leads on measured uptime — Wikipedia REST 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 Wikipedia REST and xAI Grok API need an API key?

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

Can I call Wikipedia REST and xAI Grok API from the browser?

Only Wikipedia REST 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 Wikipedia REST and xAI Grok API free for commercial use?

Wikipedia REST 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.