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Danish data service Energi vs Website Carbon

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

APIDanish data service EnergiHEALTHY87Website CarbonHEALTHY100
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms88837
P95 · ms2789166
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — no API keyFree keyless byte-based /data endpoint
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Danish data service Energi vs Website Carbon: common questions

Which is more reliable, Danish data service Energi or Website Carbon?

Both are neck-and-neck — Danish data service Energi and Website Carbon 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 Website Carbon?

Website Carbon has the lower median latency in our checks — Danish data service Energi responds in 888 ms versus Website Carbon at 37 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 Website Carbon need an API key?

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

Can I call Danish data service Energi and Website Carbon from the browser?

Neither sends browser-friendly CORS headers reliably, so call Danish data service Energi and Website Carbon 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 Website Carbon free for commercial use?

Danish data service Energi has unclear commercial terms, and Website Carbon 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.