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ColorfulClouds vs US Weather

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

APIColorfulCloudsON SCHEDULE—US WeatherNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthapiKeynone
CORSnoyes
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedU.S. Government work / public domain
Free tierFree tier — API key requiredFree (US Government public data)
Rate limitUnpublishedUnpublished (asks for a User-Agent identifying your app)
In directory since2026-07-052026-07-05
operationalpartialdownno data

ColorfulClouds vs US Weather: common questions

Which is more reliable, ColorfulClouds or US Weather?

Only US Weather is on our probe schedule so far (—% uptime over 90 days). The other is catalogued but not yet live-checked, so we can't compare measured reliability head-to-head — check the uncovered API's own status page for now.

Do ColorfulClouds and US Weather need an API key?

US Weather needs no key, while ColorfulClouds requires a free API key. If you want to start calling without signup, reach for US Weather first.

Can I call ColorfulClouds and US Weather from the browser?

Only US Weather is browser-friendly — it returns CORS headers over HTTPS. ColorfulClouds needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are ColorfulClouds and US Weather free for commercial use?

ColorfulClouds has unclear commercial terms, and US Weather 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.