homebridge-air
The AirNow plugin allows you to monitor the current AirQuality for your Zip Code from HomeKit and Siri.
aqicn-api
Node wrapper for the AQICN Air Quality Index API
waqi-js-client
JS client library for the World Air Quality Index (WAQI) APIs. All available API modules are supported - City feed, Geolocalized feed, Search, and Map Queries.