There are free pharmacy benefit managers that will get you similar negotiated discounts. There are also store programs like Walmart's $4 drugs https://www.walmart.com/cp/1078664 .

(that's what lots of drug discount cards are, you get a negotiated price instead of the cash price)

So having a PBM price is an included detail of insurance plans, I'm not sure how useful it is (I expect the formulary used by cheap insurance ends up similar to the free stuff).