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Meteorologisk Institutt vs PM2.5 Open Data Portal

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

APIMeteorologisk InstituttHEALTHY92PM2.5 Open Data PortalHEALTHY91
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms621796
P95 · ms18571352
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licenseCC BY 4.0 / NLOD (Norwegian Licence for Open Government Data)Unverified
Free tierFree, no key; requires identifying User-AgentFree — no API key
Rate limitThrottled; identify via User-Agent and respect caching headers (per docs)Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Meteorologisk Institutt vs PM2.5 Open Data Portal: common questions

Which is more reliable, Meteorologisk Institutt or PM2.5 Open Data Portal?

Both are neck-and-neck — Meteorologisk Institutt and PM2.5 Open Data Portal 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, Meteorologisk Institutt or PM2.5 Open Data Portal?

Meteorologisk Institutt has the lower median latency in our checks — Meteorologisk Institutt responds in 621 ms versus PM2.5 Open Data Portal at 796 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 Meteorologisk Institutt and PM2.5 Open Data Portal need an API key?

Neither needs a paid key — Meteorologisk Institutt is callable with no signup, and PM2.5 Open Data Portal is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Meteorologisk Institutt and PM2.5 Open Data Portal from the browser?

Only Meteorologisk Institutt is browser-friendly — it returns CORS headers over HTTPS. PM2.5 Open Data Portal needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Meteorologisk Institutt and PM2.5 Open Data Portal free for commercial use?

Meteorologisk Institutt allows commercial use on its free tier, and PM2.5 Open Data Portal 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.