CardZ Marketcap publishes PSA 10 market-cap rankings for collectible trading cards and serves them as JSON via a public read-only API. Responses include per-card price, population, market cap and snapshot metadata, and the dataset is updated daily.
Build a live leaderboard of top PSA 10 trading cards, a portfolio tracker for your collection, or a price-analytics dashboard. The API returns per-card prices, verified population counts and market-cap figures you can display or store. Snapshots are published once daily and include metadata so you always know the date of a figure. The API is read-only, needs no key, and data is CC BY 4.0 with attribution required.
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