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Danish data service Energi vs Weather Underground API

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

APIDanish data service EnergiHEALTHY87Weather Underground APIREACHABLE100
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms888104
P95 · ms27891117
AuthnoneapiKey
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — no API keyFree tier — API key may be required for production
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Danish data service Energi vs Weather Underground API: common questions

Which is more reliable, Danish data service Energi or Weather Underground API?

Both are neck-and-neck — Danish data service Energi and Weather Underground API each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Danish data service Energi or Weather Underground API?

Weather Underground API has the lower median latency in our checks — Danish data service Energi responds in 888 ms versus Weather Underground API at 104 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 Danish data service Energi and Weather Underground API need an API key?

Danish data service Energi needs no key, while Weather Underground API requires a free API key. If you want to start calling without signup, reach for Danish data service Energi first.

Can I call Danish data service Energi and Weather Underground API from the browser?

Only Weather Underground API 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 Danish data service Energi and Weather Underground API free for commercial use?

Danish data service Energi has unclear commercial terms, and Weather Underground 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.