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Cartes.io vs ISO 3166-2 API

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

APICartes.ioNEW—ISO 3166-2 APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverified (open-source project; user-generated maps)Unverified
Free tierFree, no API key for public readFree — limits not published
Rate limit60 req/window · 59 remainingUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Cartes.io vs ISO 3166-2 API: common questions

Which is more reliable, Cartes.io or ISO 3166-2 API?

On our scheduled checks, ISO 3166-2 API leads on measured uptime — Cartes.io 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 Cartes.io and ISO 3166-2 API need an API key?

Neither needs a paid key — Cartes.io is callable with no signup, and ISO 3166-2 API is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Cartes.io and ISO 3166-2 API from the browser?

Only Cartes.io is browser-friendly — it returns CORS headers over HTTPS. ISO 3166-2 API needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Cartes.io and ISO 3166-2 API free for commercial use?

Cartes.io 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.