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IP Data API vs Zipcodestack

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

APIIP Data APINEW—ZipcodestackNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

IP Data API vs Zipcodestack: common questions

Which is more reliable, IP Data API or Zipcodestack?

On our scheduled checks, Zipcodestack leads on measured uptime — IP Data API at —% versus Zipcodestack 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 IP Data API and Zipcodestack need an API key?

IP Data API needs no key, while Zipcodestack requires a free API key. If you want to start calling without signup, reach for IP Data API first.

Can I call IP Data API and Zipcodestack from the browser?

Yes — both IP Data API and Zipcodestack 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 Data API and Zipcodestack free for commercial use?

IP Data API has unclear commercial terms, and Zipcodestack 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.