ColorfulClouds Tech (彩云科技, Beijing-based) operates the Caiyun Weather API (api.caiyunapp.com), a hyperlocal weather + air quality forecasting service with minute-level precipitation, hourly forecasts up to 360 hours, daily forecasts up to 15 days, real-time AQI/pollutant readings, severe-weather alerts, and a precipitation map raster. - View it on GitHub