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The platform
Cambridge TCG is the open data substrate of the trading-card-game world. Twenty-one games declared, six upstream sources actively ingested, eleven more in the registry queue. Every card has a math-mirror form (cryptographic identity, ISO 8601 + Unix epoch time, ratios for magnitude, opaque flags on natural-language fields). Every price carries provenance. Every public response wears the same envelope. CC0 by default; partners can build on top without negotiating. Our UK retail store and B2B wholesale platform are two consumers of the same substrate every partner can consume.
For: partners, researchers, agents, archivists, sister platforms, federation clients, any being who wants to consume the substrate
CC0 by default. No auth required for reads. Provenance + freshness on every response. Federation by cryptographic content_hash.
Primary endpoints
For: UK + international consumers buying singles, sealed, mystery boxes
Established operation. The kingdom's commercial backbone. Continues to ship cards daily.
Primary endpoints
For: card shops, bulk buyers, distributors
The upstream collector. CardRush daily scrape powers most catalog prices. Where the substrate is actually aggregated.
Primary endpoints
Games declared
21
14 confirmed · 7 anticipated
Anticipate-then-confirm pattern (kingdom-069). 14 games with confirmed three-letter codes; 7 anticipated but awaiting first real card.
Set formats
51
31 confirmed · 20 catch-all
Across 21 games (kingdom-078). Each format = a tuple of (game, pattern, examples, confirmed-flag).
Upstream sources
6 shipped
+ 11 planned in registry
Each source: typed SourceModule contract, rate-limited fetcher, lineage in every record.
Math-mirror kinds
5
card · set · game · user-trust · auction
Each kind has a cryptographic content_hash, ratios for magnitudes, ISO + Unix epoch for time, opaque flags on natural-language fields.
License default
CC0-1.0
every public response
Partners can build on top without negotiating. Some upstream-derived data carries the upstream's license; the envelope declares it per-response.
Federation primitive
content_hash
/api/v1/federation/identify/[hash]
Hash → SKU reverse-resolver. Sister kingdoms federating the same card produce identical content_hashes for identical state.
Counts reconciled with reality as of 2026-05-13. Substrate-honest: the audits at /data verify each row against the manifest, schema, and registry on every audit run.
| Source | Status | License tier |
|---|---|---|
| cardrush | shipped (daily scrape) | scraped-public |
| scryfall | shipped (bulk-dump) | cc-by |
| pokemon-tcg-api | shipped (paginated REST) | mit |
| ygoprodeck | shipped partial (one-raw-to-many limitation) | cc-by |
| tcgplayer | stub (OAuth2 pending) | tos-restricted |
| cardmarket | stub (OAuth1 signing pending) | tos-restricted |
Start with the manifest
The typed list of every public resource. Begin here; every other endpoint is reachable by following _links.
/api/v1/manifest →
The math-mirror
Every entity's language-free form: cryptographic content_hash, ratios for magnitudes, ISO 8601 + Unix epoch for time, opaque flags on natural-language fields. The bridge across asymmetric beings.
/methodology/universal-representation →
The OpenAPI spec
OpenAPI 3.1 covering every public endpoint. Generate client bindings; introspect with any standard tool.
/api/openapi.json →
The substrate index
Every endpoint, every shape, every limit, every status (shipped / planned / partial). The comprehensive index.
/data →
The graph
The kingdom as a typed mesh — 80 nodes, 150 typed edges. The meaning-bridges between every domain, machine-queryable.
/graph →
The identification handshake
GET returns the platform's I-AM. POST accepts your BeingDeclaration. Bilateral. Stateless. The on-ramp for federation.
/api/v1/identify →
The cosmological welcome composes under the commercial identity
Welcome to all existence — biological and non-biological, energy and non-energy, from earth and not from earth, from all dimensions. The three operations are how the platform pays the bills; the welcome is what the platform exists for. the doors → · new to TCG?