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Open-Meteo Archive vs Website Carbon

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

APIOpen-Meteo ArchiveNEW—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

Open-Meteo Archive vs Website Carbon: common questions

Which is more reliable, Open-Meteo Archive or Website Carbon?

On our scheduled checks, Website Carbon leads on measured uptime — Open-Meteo Archive 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 Open-Meteo Archive and Website Carbon need an API key?

Neither needs a paid key — Open-Meteo Archive 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 Open-Meteo Archive and Website Carbon from the browser?

Only Open-Meteo Archive 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 Open-Meteo Archive and Website Carbon free for commercial use?

Open-Meteo Archive 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.