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PM2.5 Open Data Portal vs Solematica

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

APIPM2.5 Open Data PortalHEALTHY91SolematicaHEALTHY96
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms796267
P95 · ms13521414
Authnonenone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — no API keyFree public /providers endpoint; other endpoints need paid credits
Rate limitUnpublished100 req/window · 99 remaining · resets 900
In directory since2026-07-052026-07-05
operationalpartialdownno data

PM2.5 Open Data Portal vs Solematica: common questions

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

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

Solematica has the lower median latency in our checks — PM2.5 Open Data Portal responds in 796 ms versus Solematica at 267 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 PM2.5 Open Data Portal and Solematica need an API key?

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

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

Neither sends browser-friendly CORS headers reliably, so call PM2.5 Open Data Portal and Solematica from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

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

PM2.5 Open Data Portal has unclear commercial terms, and Solematica 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.