The free One Piece TCG price API

Live market prices for every English One Piece card, plus the booster box expected-value model that powers our EV rankings. No key, no signup, no paywall. Use it in your app, your Discord bot, your spreadsheet. All we ask is a visible credit and a link back.

Card prices

GET /api/v1/cards

Parameters: set (e.g. OP13), search (card name), limit (max 200), offset. Sorted by market price, highest first.

curl "https://onepiece.app/api/v1/cards?set=OP13&limit=3"

Each card returns id, name, number, set, rarity, variant, market_usd and url.

Sets and box EV

GET /api/v1/sets

Every tracked set with its sealed box market price, MSRP, our computed expected value of opening a box, and the EV ratio. The EV model is ours; if you publish these numbers, please say where they came from.

curl "https://onepiece.app/api/v1/sets"

Terms, in plain words

• Free for personal and commercial use.
• Credit “OnePiece Terminal” with a link to onepiece.app anywhere the data is displayed.
• Do not re-sell the raw feed as a competing data product.
• Cache what you fetch. If you need volume beyond the rate limit, email crew@onepiece.app and we will sort something out.
• Prices mirror TCGplayer market values and are point-in-time estimates, not financial advice. See our methodology.

Built something with it? Tell us at crew@onepiece.app and we will link to it from here.