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ColorfulClouds vs PM2.5 Open Data Portal

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

APIColorfulCloudsREACHABLE—PM2.5 Open Data PortalNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnono
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree tier — API key requiredFree — no API key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

ColorfulClouds vs PM2.5 Open Data Portal: common questions

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

On our scheduled checks, PM2.5 Open Data Portal leads on measured uptime — ColorfulClouds at —% versus PM2.5 Open Data Portal 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 ColorfulClouds and PM2.5 Open Data Portal need an API key?

PM2.5 Open Data Portal needs no key, while ColorfulClouds requires a free API key. If you want to start calling without signup, reach for PM2.5 Open Data Portal first.

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

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

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

ColorfulClouds has unclear commercial terms, 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.