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APIs.guru vs Passantenfrequenzen Zürich

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

APIAPIs.guruNEW—Passantenfrequenzen ZürichNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree and open, no keyFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

APIs.guru vs Passantenfrequenzen Zürich: common questions

Which is more reliable, APIs.guru or Passantenfrequenzen Zürich?

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

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

Can I call APIs.guru and Passantenfrequenzen Zürich from the browser?

Yes — both APIs.guru and Passantenfrequenzen Zürich 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 APIs.guru and Passantenfrequenzen Zürich free for commercial use?

APIs.guru has unclear commercial terms, and Passantenfrequenzen Zürich 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.