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Danish data service Energi vs PM2.5 Open Data Portal

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

APIDanish data service EnergiHEALTHY87PM2.5 Open Data PortalHEALTHY91
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms888796
P95 · ms27891352
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — no API keyFree — no API key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Danish data service Energi vs PM2.5 Open Data Portal: common questions

Which is more reliable, Danish data service Energi or PM2.5 Open Data Portal?

Both are neck-and-neck — Danish data service Energi and PM2.5 Open Data Portal 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 PM2.5 Open Data Portal?

PM2.5 Open Data Portal has the lower median latency in our checks — Danish data service Energi responds in 888 ms versus PM2.5 Open Data Portal at 796 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 PM2.5 Open Data Portal need an API key?

Neither needs a paid key — Danish data service Energi is callable with no signup, and PM2.5 Open Data Portal is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Danish data service Energi and PM2.5 Open Data Portal from the browser?

Neither sends browser-friendly CORS headers reliably, so call Danish data service Energi and PM2.5 Open Data Portal from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are Danish data service Energi and PM2.5 Open Data Portal free for commercial use?

Danish data service Energi has unclear commercial terms, and PM2.5 Open Data Portal 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.