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Bright Sky (DWD) vs wttr.in

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

APIBright Sky (DWD)UNMONITORED—wttr.inNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierUnlimited, no key, no credit cardFree — limits not published
Rate limitUnpublishedUnpublished (informal per-IP throttling)
In directory since2026-07-052026-07-05
operationalpartialdownno data

Bright Sky (DWD) vs wttr.in: common questions

Which is more reliable, Bright Sky (DWD) or wttr.in?

Only wttr.in is on our probe schedule so far (—% uptime over 90 days). The other is catalogued but not yet live-checked, so we can't compare measured reliability head-to-head — check the uncovered API's own status page for now.

Do Bright Sky (DWD) and wttr.in need an API key?

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

Can I call Bright Sky (DWD) and wttr.in from the browser?

Yes — both Bright Sky (DWD) and wttr.in send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Bright Sky (DWD) and wttr.in free for commercial use?

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