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Danish data service Energi vs Groundhog Day API

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

APIDanish data service EnergiHEALTHY87Groundhog Day APIHEALTHY98
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms888262
P95 · ms2789596
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — no API keyFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Danish data service Energi vs Groundhog Day API: common questions

Which is more reliable, Danish data service Energi or Groundhog Day API?

Both are neck-and-neck — Danish data service Energi and Groundhog Day 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 Groundhog Day API?

Groundhog Day API has the lower median latency in our checks — Danish data service Energi responds in 888 ms versus Groundhog Day API at 262 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 Groundhog Day API need an API key?

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

Can I call Danish data service Energi and Groundhog Day API from the browser?

Only Groundhog Day 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 Groundhog Day API free for commercial use?

Danish data service Energi has unclear commercial terms, and Groundhog Day 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.