Dice Stats MCP Server

An MCP (Model Context Protocol) server that provides dice rolling and probability calculation tools for tabletop RPGs.

Features

• Roll dice using standard dice notation (e.g., 2d6, 1d20+5, 3d6-2d4)
• Calculate probability distributions for dice expressions
• Supports complex dice expressions with mathematical operations (+, -, *, /)

Installation

NPX (recommended)

The easiest way to use this tool is via NPX:

npx @jmvilomet/dice-stats-mcp-server

Global Installation

You can also install it globally:

npm install -g @jmvilomet/dice-stats-mcp-server

Then run:

dice-stats-mcp-server

Using with MCP Clients

To integrate this MCP server with your MCP client (such as Claude or GPT), add the following configuration to your client's MCP server list:

{
  "mcpServers": {
    "dice-stats": {
      "command": "npx",
      "args": [
        "-y",
        "@jmvilomet/dice-stats-mcp-server"
      ]
    }
  }
}

Tools

The MCP server provides the following tools:

roll

Rolls dice according to the provided notation.

• Parameter: notation (string) - Dice notation to roll (e.g., 2d6, 1d20+5, 3d6-2d4)
• Returns: The result of the dice roll

Example:

roll("3d6+2")

stat

Calculates probability distribution for the provided dice notation.

• Parameter: notation (string) - Dice notation to analyze (e.g., 2d6, 1d20+5, 3d6-2d4)
• Returns: The probability distribution for each possible outcome

Example:

stat("2d6")

Dice Notation

The server supports the following dice notation:

• Basic dice: NdS (e.g., 1d6, 2d10, 3d4)
• Modifiers: NdS+M or NdS-M (e.g., 1d20+5, 3d6-2)
• Multiple dice groups: NdS+MdT (e.g., 1d6+2d4)
• Mathematical operations: +, -, *, / (e.g., 2d6*3, (1d8+2)/2)

Development

Setup

git clone https://github.com/JMVilomet/dice-stats-mcp-server.git
cd dice-stats-mcp-server
npm install

Build

npm run build

Run Locally

npm start

License

MIT