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IsItWater vs ISO 3166-2 API

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

APIIsItWaterNEW—ISO 3166-2 APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

IsItWater vs ISO 3166-2 API: common questions

Which is more reliable, IsItWater or ISO 3166-2 API?

On our scheduled checks, ISO 3166-2 API leads on measured uptime — IsItWater at —% versus ISO 3166-2 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 IsItWater and ISO 3166-2 API need an API key?

ISO 3166-2 API needs no key, while IsItWater requires a free API key. If you want to start calling without signup, reach for ISO 3166-2 API first.

Can I call IsItWater and ISO 3166-2 API from the browser?

Neither sends browser-friendly CORS headers reliably, so call IsItWater and ISO 3166-2 API from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are IsItWater and ISO 3166-2 API free for commercial use?

IsItWater has unclear commercial terms, and ISO 3166-2 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.