Bright Sky (DWD) vs Danish data service Energi

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

Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms
P95 · ms
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierUnlimited, no key, no credit cardFree — no API key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Bright Sky (DWD) vs Danish data service Energi: common questions

Which is more reliable, Bright Sky (DWD) or Danish data service Energi?

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

Neither needs a paid key — Bright Sky (DWD) is callable with no signup, and Danish data service Energi is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Bright Sky (DWD) and Danish data service Energi from the browser?

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

Are Bright Sky (DWD) and Danish data service Energi free for commercial use?

Bright Sky (DWD) has unclear commercial terms, and Danish data service Energi 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.