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AQICN vs Bright Sky (DWD)

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

APIAQICNREACHABLE—Bright Sky (DWD)NEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSyesyes
HTTPSnoyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredUnlimited, no key, no credit card
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

AQICN vs Bright Sky (DWD): common questions

Which is more reliable, AQICN or Bright Sky (DWD)?

On our scheduled checks, Bright Sky (DWD) leads on measured uptime — AQICN at —% versus Bright Sky (DWD) 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 AQICN and Bright Sky (DWD) need an API key?

Bright Sky (DWD) needs no key, while AQICN requires a free API key. If you want to start calling without signup, reach for Bright Sky (DWD) first.

Can I call AQICN and Bright Sky (DWD) from the browser?

Only Bright Sky (DWD) is browser-friendly — it returns CORS headers over HTTPS. AQICN needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are AQICN and Bright Sky (DWD) free for commercial use?

AQICN has unclear commercial terms, and Bright Sky (DWD) 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.