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AZ511 vs SBB Open Data

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

APIAZ511NEW—SBB Open DataNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublished6000 req/window · 5999 remaining · resets 2026-07-09 00:00:00+00:00
In directory since2026-07-052026-07-05
operationalpartialdownno data

AZ511 vs SBB Open Data: common questions

Which is more reliable, AZ511 or SBB Open Data?

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

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

Can I call AZ511 and SBB Open Data from the browser?

Neither sends browser-friendly CORS headers reliably, so call AZ511 and SBB Open Data from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are AZ511 and SBB Open Data free for commercial use?

AZ511 has unclear commercial terms, and SBB Open Data 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.