AQICN (World Air Quality Index)
FreeLiveLast verified 24 Sept 2026
Real-time air quality index, pollutant levels, and forecasts from 11,000+ global monitoring stations.
Example request
curl -s 'https://api.waqi.info/feed/shanghai/?token=$API_KEY'
Free tier, in plain English
Free registration gives an API token with a generous default 1,000 requests-per-second quota.
Alternatives in Air Quality
AirNowHourly AQI observations and daily air quality forecasts for the US, Canada and Mexico by zip or coordinate.FreeEPAUS EPA Air Quality System: ambient air monitor readings by site, county, or state.FreeIQAir AirVisualCurrent US and China AQI plus weather for the nearest city by GPS, IP or name, from hourly station readingsFreemiumLuchtmeetnetReal-time and forecast air quality measurements from Dutch government monitoring stations.FreeOpenAQAggregated PM2.5, NO2, O3 and other pollutant readings from ground monitoring stations worldwide.Freemium