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IP Address API vs ip.app

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

APIIP Address APIHEALTHY93ip.appHEALTHY100
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms51376
P95 · ms3736276
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

IP Address API vs ip.app: common questions

Which is more reliable, IP Address API or ip.app?

Both are neck-and-neck — IP Address API and ip.app 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, IP Address API or ip.app?

ip.app has the lower median latency in our checks — IP Address API responds in 513 ms versus ip.app at 76 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 IP Address API and ip.app need an API key?

Neither needs a paid key — IP Address API is callable with no signup, and ip.app is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call IP Address API and ip.app from the browser?

Yes — both IP Address API and ip.app 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 IP Address API and ip.app free for commercial use?

IP Address API has unclear commercial terms, and ip.app 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.