Data Sources
MasterSet.io combines hand-curated checklists with several external data providers. Every integration is optional — the app works without them, falling back to existing data and search links.
Pokémon TCG API
Card metadata, official set info, and images. Used by the enrichment process.
PriceCharting
Printing-aware pricing (raw and graded) and, for many cards, the TCGplayer product match behind the "Buy on TCGplayer" link.
eBay Browse API
Optional live marketplace listings shown on card detail pages.
eBay Partner Network
Optional affiliate tracking on outbound eBay links.
TCGplayer / Impact
Optional affiliate tracking on outbound TCGplayer links (via Impact.com).
Manual curation
Card inclusion, names, sets, numbers, and rarities are curated by hand. Provider data enriches images and prices but never overwrites curated fields without review.
MasterSet.io is an independent collector tool and is not affiliated with, endorsed by, or sponsored by The Pokémon Company, Nintendo, or any marketplace provider.