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Glax Weather API vs IPMA

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

APIGlax Weather APINEW—IPMANEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedIPMA open data (attribution 'Fonte: IPMA' expected)
Free tierFree — limits not publishedFree, no key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Glax Weather API vs IPMA: common questions

Which is more reliable, Glax Weather API or IPMA?

On our scheduled checks, IPMA leads on measured uptime — Glax Weather API at —% versus IPMA 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 Glax Weather API and IPMA need an API key?

Neither needs a paid key — Glax Weather API is callable with no signup, and IPMA is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Glax Weather API and IPMA from the browser?

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

Are Glax Weather API and IPMA free for commercial use?

Glax Weather API has unclear commercial terms, and IPMA 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.