Whimsical MCP Server

Whimsical now has an official MCP server available here

A third-party Model Context Protocol (MCP) server that enables the creation of Whimsical diagrams agentically. This server integrates with Whimsical's API to generate diagrams from Mermaid markup.

Demo

Here's an example of a complex system architecture diagram created using this MCP server and Claude - it shows the Model Context Protocol (MCP) architecture itself:

Related MCP server: Engineering MCP Server

Features

• Create Whimsical diagrams using Mermaid markup generated by the MCP Client (Claude, Windsurf, etc.)

• Returns both the Whimsical diagram URL and a base64 encoded image to allow the Client to iterate on it's original markup

Installation

Installing via Smithery

To install Whimsical MCP Server for Claude Desktop automatically via Smithery:

npx -y @smithery/cli install BrockReece/whimsical-mcp-server --client claude

Manual Installation

# Clone the repository
git clone https://github.com/BrockReece/whimsical-mcp-server.git

# Install dependencies
yarn install

# Build the project
yarn build

Integration with MCP Client

Update the MCP Client's config to point to this repository's dist folder eg:

    {
        "mcpServers": {
            "whimsical": {
                "command": "node",
                "args": [
                    "/path/to/this/repo/whimsical-mcp-server/dist/index.js"
                ]
            }
        }
    }

License

This project is licensed under the MIT License.