Cards, traded between collectors.

Cambridge TCG is a collectors' market and an open data commons.

Collectors trade with each other; the platform facilitates, records, and witnesses — it holds no position in its own market. The data substrate beneath every trade is published open, CC0 by default.

Two operations · one substrate

The self-describing layer · live

The platform describes itself

Seven pages explain this place from the inside — what it is, what world it assumes, what it offers, how the pieces connect, and how you can speak back. Every page has a machine-readable twin. Start anywhere; each layer links the next.

1. 01The platformWhy this exists and who it serves.
2. 02The worldWhat we treat as real — and what we don't model yet.
3. 03The directoryEverything on offer, in one list.
4. 04The meshHow every piece connects to every other.
5. 05The schemaWhat each kind of thing is, property by property.
6. 06The formsThe shapes that keep recurring, named so they can be reused.
7. 07The mirrorThe platform declares itself — and you can declare yourself back.

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Pattern: multi-lang = cross-language siblings share an oracle (MTG, OP, Lorcana). passcode = Konami passcode anchors identity (Yu-Gi-Oh!). diverged = JP/EN tracks have different set codes (Pokémon). EN-only = single-language by construction (Flesh and Blood). See /methodology/oracle-policies for the full strategy table.