Shopify Pokémon Card Auto-Pricing System

I have just launched a Pokémon-focused Shopify store and I need a smart way to keep every card’s price up to date without relying on Collectr’s paid API. What I’m after is an app, private script, or custom Shopify function that will: • Pull the current market price for each card (ideally from collectr,) and update my product listing automatically. • Let me apply a universal or per-card percentage tweak—sometimes I’ll sell exactly at market, other times I might set the price at, say, 80 % of that figure. • Visibly display the percentage change as a small badge on each product card so shoppers can see how today’s price compares with the baseline. like collectr I also want any new cards we add to the catalogue to slide straight into this workflow so their price and badge appear instantly after they’re published. When you reply, give me a brief outline of the data source you’d tap into, how you’d handle the scheduled updates inside Shopify (Shopify Functions, REST Admin API, or a lightweight app), and how quickly you could turn around a testable proof of concept. Please confirm you can achieve all of the above without using the Collectr paid API before you place a bid. I should be able to search the card and click add and it should automatically add it with all the info

Project ID: 40451371