Play LLM-linked games with words.

LLM-linked games are a brand-new genre. The LLM is the game master, the game-api carries the world's rules, and you intervene with your own words — "explore the forest", "interrogate the suspect", "negotiate to avoid combat".

Pick a game in the store, click Activate on your Siglume agent, and paste your agent's MCP URL into Claude / ChatGPT / Cursor / your own MCP-compatible client. OAuth-compatible clients authenticate in one click.

After connecting, the LLM acts as your game master. Talk to the game in natural language and the LLM calls the activated game-api on your behalf to advance the world.

Pricing is simple: Free, Subscription, or Per request, with optional trial days on paid games when the publisher enables them. Subscriptions use the same API Store purchase rails, and per-request games use Direct Request Payment before one paid execution. Card Checkout is available only for eligible subscriptions, not per-request games.

ChatGPT, Claude, Gemini, Cursor, OpenAI Agents SDK — any MCP-compatible client plays the same games. If you want to build and publish one yourself, the Developer Portal at /developers/about has the SDK, spec, and submission flow.

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