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Glax Weather API vs UK Carbon Intensity

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

APIGlax Weather APIHEALTHY87UK Carbon IntensityHEALTHY70
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms1004789
P95 · ms25341948
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

Glax Weather API vs UK Carbon Intensity: common questions

Which is more reliable, Glax Weather API or UK Carbon Intensity?

Both are neck-and-neck — Glax Weather API and UK Carbon Intensity each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Glax Weather API or UK Carbon Intensity?

UK Carbon Intensity has the lower median latency in our checks — Glax Weather API responds in 1004 ms versus UK Carbon Intensity at 789 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Glax Weather API and UK Carbon Intensity need an API key?

Neither needs a paid key — Glax Weather 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 Glax Weather API and UK Carbon Intensity from the browser?

Only UK Carbon Intensity 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 UK Carbon Intensity free for commercial use?

Glax Weather 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.