Whimsical MCP server

Whimsical MCP Server enables the creation of Whimsical diagrams programmatically through the Model Context Protocol (MCP). It integrates with Whimsical's API to generate diagrams from Mermaid markup, making it easy to create visual diagrams using AI assistance.

Installation Options

Installing via Smithery

The easiest way to install Whimsical MCP Server for Claude Desktop is automatically via Smithery:

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

Manual Installation

If you prefer to install manually, follow these steps:

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

# Install dependencies
yarn install

# Build the project
yarn build

Configuration

After installation, you'll need to integrate the MCP Server with your MCP Client by updating the client's configuration.

Integration with MCP Client

Update the MCP Client's config to point to the server's dist folder:

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

Usage

Once installed and configured, you can use your MCP Client (such as Claude or Windsurf) to generate Mermaid markup, which the Whimsical MCP Server will convert into Whimsical diagrams.

Features

• Create Whimsical diagrams using Mermaid markup generated by your MCP Client
• Receive both the Whimsical diagram URL and a base64 encoded image
• Iterate on your diagram by refining the original markup

The server handles the communication with Whimsical's API, allowing your AI assistant to create and refine diagrams through natural language requests.

How to add this MCP server to Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > MCP and click "Add new global MCP server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

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

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explictly ask the agent to use the tool by mentioning the tool name and describing what the function does.