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Bright Sky (DWD) vs Glax Weather API

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

APIBright Sky (DWD)NEW—Glax Weather APINEW—
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 — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Bright Sky (DWD) vs Glax Weather API: common questions

Which is more reliable, Bright Sky (DWD) or Glax Weather API?

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

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

Can I call Bright Sky (DWD) and Glax Weather API from the browser?

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

Are Bright Sky (DWD) and Glax Weather API free for commercial use?

Bright Sky (DWD) has unclear commercial terms, and Glax Weather API 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.