Solutions
Six things people build with this, and what each one gets wrong
Every card project runs into the same handful of problems, and which one bites you depends entirely on what you are building. These pages are organised by project rather than by feature: the fields that project actually needs, the mistakes it usually makes, and the queries that avoid them — across all 9 games.
Collection tracking
A collection tracker is a pricing problem wearing a catalogue costume
Build a collection tracker across nine games with per-printing identity, both markets priced, and a valuation your users can actually act on.
Collection trackerDeck building
Deck builders live or die on legality, not on card text
Build a deck builder with per-format legality, typed game fields and deck costing across nine games from one schema.
Deck builderMarketplaces
Every card marketplace needs the same four things
Catalog, prices, images and a scanner, from one API: per-printing pricing in both currencies, the cheapest copy per language and condition, and a listing flow that starts with a photo.
Marketplace and storefrontRetail operations
The buy counter is where a card shop makes or loses its margin
Price trade-ins and manage shop inventory with dealer bid data, per-printing identity and fast lookup by scan or search.
Card shop and buy deskPortfolio and analytics
A portfolio marked at retail is a portfolio marked wrong
Build card portfolio and valuation tools on daily price history, dealer exit prices and per-printing identity across nine games.
Portfolio trackerMonitoring
Polling for price moves is a race you pay to lose
Build price alerts and market monitoring on signed webhooks, daily history and thresholds across nine games.
Price alerts and monitoring
Not listed
Building something else?
These are the six we see most often, not a list of what is permitted. The same catalogue, prices and webhooks underpin all of them, so if your project is not here the building blocks still are — start with the quickstart and the price docs.
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