D&D Beyond MCP Server

A Model Context Protocol (MCP) server that gives Claude direct access to your D&D Beyond account — characters, campaigns, sourcebooks, spells, monsters, and more.

Features

Prerequisites

• Node.js 18 or later

• Claude Code CLI

Installation

Option A — Install directly from GitHub (recommended)

npm install -g "https://github.com/ddb-mcp/ddb-mcp/archive/refs/heads/main.tar.gz"

Then install the browser:

npx playwright install chromium

Find the install path and register with Claude Code:

npm root -g
# outputs something like /usr/local/lib/node_modules

claude mcp add dndbeyond node /usr/local/lib/node_modules/ddb-mcp/dist/index.js

Option B — Clone and build manually

git clone https://github.com/ddb-mcp/ddb-mcp.git
cd ddb-mcp
npm install
npx playwright install chromium

Register with Claude Code:

claude mcp add dndbeyond node /absolute/path/to/ddb-mcp/dist/index.js

Or edit ~/.claude/settings.json manually:

{
  "mcpServers": {
    "dndbeyond": {
      "command": "node",
      "args": ["/absolute/path/to/ddb-mcp/dist/index.js"]
    }
  }
}

Usage

First-time login

The first time you use the server, you need to authenticate:

ddb_login

A browser window (Chrome for Testing) will open and navigate to the D&D Beyond login page. Complete the login using your Wizards ID account. Once you're redirected back to D&D Beyond, your session is automatically saved to ~/.config/ddb-mcp/session.json and reused on all future calls.

You only need to log in once. If your session expires, just run ddb_login again.

Example prompts

List your characters:

List all my D&D Beyond characters

Get full character data:

Get the full character sheet for character ID 140476673

List your campaigns:

What campaigns am I part of on D&D Beyond?

Get campaign details:

Show me the details for campaign 6709239, including all the player characters

Search for spells:

Search D&D Beyond for spells named "Fireball"

Search for monsters:

Find the Beholder stat block on D&D Beyond

Read a sourcebook:

Show me the table of contents for the Player's Handbook

Read the Barbarian class section from the Player's Handbook

Download a character:

Download the character data for Roland Stonehelm to my Downloads folder

Finding character and campaign IDs

• Character ID: The number in the character URL — dndbeyond.com/characters/140476673

• Campaign ID: The number in the campaign URL — dndbeyond.com/campaigns/6709239

You can also use ddb_list_characters and ddb_list_campaigns to get IDs without leaving Claude.

Book slugs for ddb_read_book

Use ddb_list_library to get the slug for any book you own. Examples:

To read a specific chapter, pass the chapter path after the book slug:

ddb_read_book("dnd/phb-2024", "character-classes/barbarian")

Upgrading

To upgrade to the latest release, run the install command again — npm will overwrite the existing installation:

npm install -g "https://github.com/ddb-mcp/ddb-mcp/archive/refs/heads/main.tar.gz"

To install a specific tagged version:

npm install -g "https://github.com/ddb-mcp/ddb-mcp/archive/refs/tags/v1.0.2.tar.gz"

Then restart Claude Code and run /mcp to reconnect the server.

Session storage

Your session is saved to ~/.config/ddb-mcp/session.json. This file contains browser cookies and local storage from your D&D Beyond login. Keep this file private — it grants access to your account.

To log out or reset your session, delete the file:

rm ~/.config/ddb-mcp/session.json

Development

# Run in development mode (no build step needed)
npm run dev

# Build
npm run build

# Watch mode
npm run build:watch

License

MIT