Hi Ariav,
Yep just as Jason shows us here, just to put /add after /cart should do the trick for you here. Yours would like this for example: - https://store.uprightpose.com/cart/add/43106781710
There is also a way to add different quantities for this feature also. It would slightly change the layout of this to something like this for example https://store.uprightpose.com/cart/add?id=43106781710&quantity=99. Maybe Jason knows a more simple way to put the link together for a different quantity in the cart?
Nick