It is unclear what units the different pollutants are reported in. While I can infer the units by looking at other sources, it would be good to add those explicitly to the converted XML or at least to the JSON. Can you help confirm the units being reported?
I saw that some functions for the data (e.g. get_current_air_data) have up to 3 API calls. It could be good to specify this in the documentation. I don't know to what extend the API lends itself to directly call a function based upon the name (instead of type and ID).
On a side note, you could also explain how the name or the type + ID is necessary in the docs. You could also do a quick test to
Zephyr is a platform which provides users with the predicted Air Quality Index levels of air pollution for 39 cities of India with daily, monthly and yearly trends. It also provides some of the statistics observed for AQI over these cities and various latest articles and blogs related to air pollution.