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Automatic Weather Stations vs Website Carbon

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

APIAutomatic Weather StationsNEW—Website CarbonNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree keyless byte-based /data endpoint
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Automatic Weather Stations vs Website Carbon: common questions

Which is more reliable, Automatic Weather Stations or Website Carbon?

On our scheduled checks, Website Carbon leads on measured uptime — Automatic Weather Stations at —% versus Website Carbon 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 Automatic Weather Stations and Website Carbon need an API key?

Neither needs a paid key — Automatic Weather Stations 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 Automatic Weather Stations and Website Carbon from the browser?

Only Automatic Weather Stations is browser-friendly — it returns CORS headers over HTTPS. Website Carbon needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Automatic Weather Stations and Website Carbon free for commercial use?

Automatic Weather Stations 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.