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Arul's IP API vs IPWhois

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

APIArul's IP APIHEALTHY94IPWhoisHEALTHY100
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms50223
P95 · ms1469598
AuthnoneapiKey
CORSyesyes
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key may be required for production
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Arul's IP API vs IPWhois: common questions

Which is more reliable, Arul's IP API or IPWhois?

Both are neck-and-neck — Arul's IP API and IPWhois each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Arul's IP API or IPWhois?

IPWhois has the lower median latency in our checks — Arul's IP API responds in 502 ms versus IPWhois at 23 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Arul's IP API and IPWhois need an API key?

Arul's IP API needs no key, while IPWhois requires a free API key. If you want to start calling without signup, reach for Arul's IP API first.

Can I call Arul's IP API and IPWhois from the browser?

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

Are Arul's IP API and IPWhois free for commercial use?

Arul's IP API 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.