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AZ511 vs Transport for The Netherlands

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

APIAZ511HEALTHY77Transport for The NetherlandsHEALTHY91
Uptime · 30d
Uptime · 90d95.1%99.02%
Uptime · 30d95.0%98.3%
P50 · ms2272680
P95 · ms46101557
AuthapiKeynone
CORSnono
HTTPSyesno
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

AZ511 vs Transport for The Netherlands: common questions

Which is more reliable, AZ511 or Transport for The Netherlands?

On our scheduled checks, Transport for The Netherlands leads on measured uptime — AZ511 at 95.1% versus Transport for The Netherlands at 99.02% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Which is faster, AZ511 or Transport for The Netherlands?

Transport for The Netherlands has the lower median latency in our checks — AZ511 responds in 2272 ms versus Transport for The Netherlands at 680 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do AZ511 and Transport for The Netherlands need an API key?

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

Can I call AZ511 and Transport for The Netherlands from the browser?

Neither sends browser-friendly CORS headers reliably, so call AZ511 and Transport for The Netherlands 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 Transport for The Netherlands free for commercial use?

AZ511 has unclear commercial terms, and Transport for The Netherlands 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.