How do I get all card data (including CustomFieldItems) from a single list

[Peter Gamble]

I am trying to get all cards from a single list and would like the cards to include all fields (including customFieldItems)

Is there a way to do it with a single query?

Or is it a two step process where I have to get all cards in a board (using card_customFieldItems=true) and then parse the output to find only the cards I want by checking for only the idList that I care about?