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Danish data service Energi vs GrünstromIndex

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

APIDanish data service EnergiNEW—GrünstromIndexNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — no API keyFree under fair-use policy
Rate limitUnpublishedFair-use (paid tiers for higher limits)
In directory since2026-07-052026-07-05
operationalpartialdownno data

Danish data service Energi vs GrünstromIndex: common questions

Which is more reliable, Danish data service Energi or GrünstromIndex?

On our scheduled checks, GrünstromIndex leads on measured uptime — Danish data service Energi at —% versus GrünstromIndex at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Danish data service Energi and GrünstromIndex need an API key?

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

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

Only GrünstromIndex 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 GrünstromIndex free for commercial use?

Danish data service Energi has unclear commercial terms, and GrünstromIndex 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.