Get the amount of an item, that is currently stocked in bank

[kinnaj93]

Hello,

what I would like to retrieve is the following number, of the tooltip you get, when you hover over an item or similar stuff.



I have access to the item link and the slot of the item, but haven't found a proper method or attribute to do so on the api page yet. Does anyone know how I get to that info?

Thanks in advance

Jannik