Dice Roller

MCP Dice Roller 🎲

A simple MCP (Model Context Protocol) server for rolling dice. Perfect for tabletop games, random decisions, and more!

Features

• Standard Dice Notation - Roll any dice using notation like 2d6, 1d20+5, 3d8-2
• Keep Highest/Lowest - Support for 4d6kh3 (keep highest 3) and 2d20kl1 (keep lowest)
• D&D Stat Rolling - Quick character stat generation using 4d6 drop lowest
• Coin Flips - Simple heads or tails
• Random Picker - Choose randomly from a list of options
• Percentile Dice - Roll d100 with tens and ones dice

Installation

pip install mcp-dice-roller

Usage

With Claude Desktop

Add to your Claude Desktop configuration (~/Library/Application Support/Claude/claude_desktop_config.json on macOS):

{

"mcpServers": { "dice-roller": { "command": "python", "args": ["-m", "mcp_dice_roller"] } } }

With VS Code

Add to your VS Code MCP settings:

{

"mcp.servers": { "dice-roller": { "command": "python", "args": ["-m", "mcp_dice_roller"] } } }

Tools

roll_dice

Roll dice using standard notation.

roll_dice("2d6")       → Roll two 6-sided dice

roll_dice("1d20+5") → Roll d20 and add 5 roll_dice("4d6kh3") → Roll 4d6, keep highest 3 roll_dice("2d20kl1") → Roll 2d20, keep lowest (disadvantage)

Example Response:

{

"notation": "2d6+3", "rolls": [4, 6], "kept": [4, 6], "subtotal": 10, "modifier": 3, "total": 13 }

roll_multiple

Roll the same dice multiple times with statistics.

roll_multiple("1d20", 5)  → Roll d20 five times

Example Response:

{

"notation": "1d20", "times": 5, "totals": [15, 8, 20, 3, 12], "statistics": { "min": 3, "max": 20, "sum": 58, "average": 11.6 } }

roll_dnd_stats

Generate D&D 5e character ability scores.

Example Response:

{

"method": "4d6 drop lowest", "stats": [ {"rolls": [4, 3, 5, 6], "kept": [4, 5, 6], "total": 15}, {"rolls": [2, 4, 4, 3], "kept": [3, 4, 4], "total": 11}, ... ], "totals": [15, 11, 14, 13, 10, 16], "sum": 79 }

flip_coin

Flip a coin.

flip_coin()      → Flip once

flip_coin(10) → Flip 10 times

pick_random

Pick randomly from options.

pick_random("pizza, burger, sushi, tacos")

Example Response:

{

"options": ["pizza", "burger", "sushi", "tacos"], "selected": "sushi", "total_options": 4 }

roll_percentile

Roll d100 (percentile dice).

Example Response:

{

"tens_die": 7, "ones_die": 3, "result": 73 }

Development

Setup

# Clone the repository

git clone https://github.com/vandewilly/mcp-dice-roller.git cd mcp-dice-roller

Install dependencies

pip install -e ".[dev]"

Run tests

pytest

Running Locally

python -m mcp_dice_roller

MCP Registry

MCP Name: io.github.vandewilly/dice-roller

This server is published to the MCP Registry.

License

MIT License - see LICENSE for details.

Author

Vandewilly Silva (@vandewilly)