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PM2.5 Open Data Portal vs Solematica

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

APIPM2.5 Open Data PortalNEW—SolematicaNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
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?

On our scheduled checks, Solematica leads on measured uptime — PM2.5 Open Data Portal at —% versus Solematica 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 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.