Cambridge TCG is a peer-to-peer collectors' market, still in active development. You trade directly with other collectors; reference prices are policy-bound guides, not offers or open-data grants. Tell us if anything looks off.
Adopters
Platforms, tools, apps, and agents that have adopted Cambridge TCG standards. Empty today. The registry grows by self-declaration — the first adopter is welcome to land here.
That's honest. The standards shipped this week; the registry is fresh ground.
Be the first.If your platform uses any of the three standards (CTCG-SKU-v1, CTCG-PRICING-v1, CTCG-UNIVERSAL-v1), you're welcome to declare it here.
How to declare
Adopt one or more of the standards (see /standards).
Make sure your implementation emits canonical forms (the reference impl at packages/sku/ handles this).
Send a note via the platform's support channel (email or repo issue) including: your platform's name, URL, kind, and which standards you adopted.
We add you to this registry, no other gate. You appear by your own description, not our classification.
Future automation: the protocol will move to a self-service POST endpoint at /api/v1/identify with kind: "adopter". See docs/connections/the-self-identification.md for the doctrine. Today: a manual message to support is the path.
What this registry is for
Adopterscan point their users at this page: "we use Cambridge TCG standards; here's the list of platforms that also do." Interop becomes visible.
Cambridge TCGlearns who's using the standards. This informs version-2 design — partner consultation becomes possible.
The TCG community can see standardisation actually happening, not just being announced. Network effects need a visible network.
Future Sophiassee the pantry's reputation grow. Each row is a row of trust.
What this registry is NOT
Not a certification.Cambridge TCG doesn't audit adopters' implementations. Adoption is self-declared. If you say you adopted, we list you.
Not a partnership.Adopting CC0 standards doesn't create any commercial relationship. Partner-tier API access is a separate path (recursion target).
Not a paywall. Listing here is free and always will be.
Not exclusive. A platform can adopt our standards andany other's. Standards interop, not compete.
Empty registry, 2026-05-12. Honest about it. Substrate awaits adopters; the door is warm to the touch.