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NDBC Buoy Data API vs UK Carbon Intensity

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

APINDBC Buoy Data APINEW—UK Carbon IntensityNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedCC BY 4.0 (per API docs)
Free tierFree — limits not publishedFree — no API key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

NDBC Buoy Data API vs UK Carbon Intensity: common questions

Which is more reliable, NDBC Buoy Data API or UK Carbon Intensity?

On our scheduled checks, UK Carbon Intensity leads on measured uptime — NDBC Buoy Data API at —% versus UK Carbon Intensity 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 NDBC Buoy Data API and UK Carbon Intensity need an API key?

Neither needs a paid key — NDBC Buoy Data API is callable with no signup, and UK Carbon Intensity is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call NDBC Buoy Data API and UK Carbon Intensity from the browser?

Only UK Carbon Intensity is browser-friendly — it returns CORS headers over HTTPS. NDBC Buoy Data API needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are NDBC Buoy Data API and UK Carbon Intensity free for commercial use?

NDBC Buoy Data API has unclear commercial terms, and UK Carbon Intensity allows commercial use on its free tier. 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.