exactodds-mcp

What ExactOdds is

ExactOdds makes dice that can't lie. It provides the core building blocks for games of chance — dice rolls, coin flips — with the math out in the open and every result verifiable. If a result can't be proven fair, it is refused.

Here is why that matters. An online game runs the same code on many platforms — a phone, a browser, a server — and players have to trust that the house didn't tilt the odds on any one of them. ExactOdds removes the need for trust: the reference games are run through five programming languages — Python, JavaScript, TypeScript, C, and C++ — and all five must print byte-identical results, checked mechanically, not claimed.

If five independent implementations agree down to the last byte, the game can't favor the house on one platform and rob it on another. A disagreement isn't smoothed over — it stops the line. The refusal is the guarantee.

This package exposes every rule as an MCP tool for agents: same integer math, same verifiable results, callable over stdio.

Every ExactOdds rule pack as an MCP tool — 35 tools, stdio transport. For agents that settle bets, check limits, or audit casino math.

{
  "mcpServers": {
    "exactodds": {
      "command": "npx",
      "args": ["-y", "exactodds-mcp"]
    }
  }
}

Tools include roll_dice, settle_moneyline, baccarat_settle, affiliate_pay, aml_structuring, rtp_bps, raffle_winner, and 28 more. Every tool takes integer params and returns an integer — all money in cents.

Regenerating

python3 build.py   # regenerates server.js from games/*.exactodds

License

AGPL-3.0-only. Commercial licenses: [email protected] — $2,500/yr per operator.