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NDBC Buoy Data API vs Weatherstack

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

APINDBC Buoy Data APINEW—WeatherstackNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key required
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

NDBC Buoy Data API vs Weatherstack: common questions

Which is more reliable, NDBC Buoy Data API or Weatherstack?

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

NDBC Buoy Data API needs no key, while Weatherstack requires a free API key. If you want to start calling without signup, reach for NDBC Buoy Data API first.

Can I call NDBC Buoy Data API and Weatherstack from the browser?

Neither sends browser-friendly CORS headers reliably, so call NDBC Buoy Data API and Weatherstack from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are NDBC Buoy Data API and Weatherstack free for commercial use?

NDBC Buoy Data API has unclear commercial terms, and Weatherstack 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.