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Aare.guru API vs DFlight API

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

APIAare.guru APINEW—DFlight APINEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Aare.guru API vs DFlight API: common questions

Which is more reliable, Aare.guru API or DFlight API?

On our scheduled checks, DFlight API leads on measured uptime — Aare.guru API at —% versus DFlight 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 Aare.guru API and DFlight API need an API key?

Neither needs a paid key — Aare.guru API is callable with no signup, and DFlight API is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Aare.guru API and DFlight API from the browser?

Yes — both Aare.guru API and DFlight 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 Aare.guru API and DFlight API free for commercial use?

Aare.guru API has unclear commercial terms, and DFlight 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.