One post tagged with "price-tracker"

Every sports card price tracker starts with the same unglamorous problem: getting clean card data. Before you can chart what a rookie card did over the last six months, you need to know that the card exists, which set it belongs to, which player is on it, and which parallel or variation you're actually looking at.

That identity layer is what a sports card API gives you, and it's the part most people underestimate when they start scraping marketplace listings instead.