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ipapi.co vs IPWhois

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

APIipapi.coNEW—IPWhoisNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnoyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — quota not published; returns 429 when exceededFree tier — API key may be required for production
Rate limitUnpublished (429 Quota exceeded)Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ipapi.co vs IPWhois: common questions

Which is more reliable, ipapi.co or IPWhois?

On our scheduled checks, IPWhois leads on measured uptime — ipapi.co at —% versus IPWhois 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 ipapi.co and IPWhois need an API key?

ipapi.co needs no key, while IPWhois requires a free API key. If you want to start calling without signup, reach for ipapi.co first.

Can I call ipapi.co and IPWhois from the browser?

Neither sends browser-friendly CORS headers reliably, so call ipapi.co and IPWhois from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are ipapi.co and IPWhois free for commercial use?

ipapi.co has unclear commercial terms, and IPWhois 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.