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Danish data service Energi vs Hong Kong Observatory

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

APIDanish data service EnergiHEALTHY87Hong Kong ObservatoryHEALTHY60
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms8881415
P95 · ms27893670
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedHKO open data (see terms of use)
Free tierFree — no API keyFree, no key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Danish data service Energi vs Hong Kong Observatory: common questions

Which is more reliable, Danish data service Energi or Hong Kong Observatory?

Both are neck-and-neck — Danish data service Energi and Hong Kong Observatory 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 Hong Kong Observatory?

Danish data service Energi has the lower median latency in our checks — Danish data service Energi responds in 888 ms versus Hong Kong Observatory at 1415 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 Hong Kong Observatory need an API key?

Neither needs a paid key — Danish data service Energi is callable with no signup, and Hong Kong Observatory is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Danish data service Energi and Hong Kong Observatory from the browser?

Only Hong Kong Observatory 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 Hong Kong Observatory free for commercial use?

Danish data service Energi has unclear commercial terms, and Hong Kong Observatory 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.