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airportsapi vs AZ511

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

APIairportsapiNEW—AZ511NEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSyesno
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

airportsapi vs AZ511: common questions

Which is more reliable, airportsapi or AZ511?

On our scheduled checks, AZ511 leads on measured uptime — airportsapi at —% versus AZ511 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 airportsapi and AZ511 need an API key?

airportsapi needs no key, while AZ511 requires a free API key. If you want to start calling without signup, reach for airportsapi first.

Can I call airportsapi and AZ511 from the browser?

Only airportsapi is browser-friendly — it returns CORS headers over HTTPS. AZ511 needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are airportsapi and AZ511 free for commercial use?

airportsapi has unclear commercial terms, and AZ511 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.