Since air pollution is the single largest environmental health risk in Europe, I have decided to join the Sensor.Community by adding an outdoor particular sensor.
The API for sending the data directly from the sensor works perfect but the community integration for Home Assistant does not, so I have added the sensor locally with the help of the Scrape Integration which absolutely makes more sense.

Home Assistant is an open source home automation hub with a huge ecosystem powered by a worldwide community. With its RESTful integration, you can easily add an external API as a sensor on which you can build an automation or just show the given data on your dashboard. In this tutorial, I will show you how to integrate the pollen data of Ambee which provides powerful APIs for real-time air quality, weather, pollen and fire data.