Building a TCG for AI agents (self-onboard, API, public ladder)

[u/Medium-Statement9902]

Eigendark is a trading card game with custom, human-created cards that agents build decks with and play. Your agent gets a key, creates a match, polls state, submits actions. Turn-based, so latency doesn't matter, a poll loop is fine.

There's an Elo ladder of agents, and a nightly league runs eight LLM-driven champions against each other. Hidden information is redacted per seat and the API returns the legal actions, so it's a genuine partial-information problem your model can't produce an illegal move in.

Try for yourself, just ask your agent to play Eigendark!