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airportsapi vs Transport for Spain

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

APIairportsapiNEW—Transport for SpainNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — no key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

airportsapi vs Transport for Spain: common questions

Which is more reliable, airportsapi or Transport for Spain?

On our scheduled checks, Transport for Spain leads on measured uptime — airportsapi at —% versus Transport for Spain 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 Transport for Spain need an API key?

Neither needs a paid key — airportsapi is callable with no signup, and Transport for Spain is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call airportsapi and Transport for Spain from the browser?

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

Are airportsapi and Transport for Spain free for commercial use?

airportsapi has unclear commercial terms, and Transport for Spain 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.