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Bright Sky (DWD) vs Glax Weather API

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

APIBright Sky (DWD)HEALTHY72Glax Weather APIHEALTHY87
Uptime · 30d
Uptime · 90d99.02%100%
Uptime · 30d98.3%100%
P50 · ms6561004
P95 · ms33492534
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 99.02% versus Glax Weather API at 100% 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, Bright Sky (DWD) or Glax Weather API?

Bright Sky (DWD) has the lower median latency in our checks — Bright Sky (DWD) responds in 656 ms versus Glax Weather API at 1004 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 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.