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AZ511 vs Road511

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

APIAZ511HEALTHY75Road511DEAD0
Uptime · 30d
Uptime · 90d91.1%0.0%
Uptime · 30d85.0%0.0%
P50 · ms1440—
P95 · ms4972—
AuthapiKeyapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree tier — API key required
Rate limitUnpublished70 req/window · 69 remaining · resets 1783522019
In directory since2026-07-052026-07-05
operationalpartialdownno data

AZ511 vs Road511: common questions

Which is more reliable, AZ511 or Road511?

On our scheduled checks, AZ511 leads on measured uptime — AZ511 at 91.1% versus Road511 at 0.0% 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 Road511 need an API key?

Both ask you to authenticate — AZ511 uses an API key and Road511 uses an API key. Each key is free to obtain; the Auth and Card-required rows above spell out the signup terms.

Can I call AZ511 and Road511 from the browser?

Only Road511 is browser-friendly — it returns CORS headers over HTTPS. AZ511 needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are AZ511 and Road511 free for commercial use?

AZ511 has unclear commercial terms, and Road511 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.