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ISO 3166 Updates API vs OpenPLZ API

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

APIISO 3166 Updates APIHEALTHY78OpenPLZ APIHEALTHY94
Uptime · 30d
Uptime · 90d100%99.02%
Uptime · 30d100%98.3%
P50 · ms1402561
P95 · ms2526903
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limit500 req/windowUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ISO 3166 Updates API vs OpenPLZ API: common questions

Which is more reliable, ISO 3166 Updates API or OpenPLZ API?

On our scheduled checks, ISO 3166 Updates API leads on measured uptime — ISO 3166 Updates API at 100% versus OpenPLZ API at 99.02% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, ISO 3166 Updates API or OpenPLZ API?

OpenPLZ API has the lower median latency in our checks — ISO 3166 Updates API responds in 1402 ms versus OpenPLZ API at 561 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 ISO 3166 Updates API and OpenPLZ API need an API key?

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

Can I call ISO 3166 Updates API and OpenPLZ API from the browser?

Yes — both ISO 3166 Updates API and OpenPLZ API 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 ISO 3166 Updates API and OpenPLZ API free for commercial use?

ISO 3166 Updates API has unclear commercial terms, and OpenPLZ 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.