MCP Chart Server

A Model Context Protocol (MCP) server that provides comprehensive chart generation capabilities. This server offers a wide variety of chart types with comprehensive Zod schema validation for type-safe chart configuration.

Claude.AI Integration (Free Running Version)

For immediate use with Claude.AI without local setup, use these public endpoints:

• Streamable HTTP: https://chart.mcp.cloudcertainty.com/mcp
• Server-Sent Events: https://chart.mcp.cloudcertainty.com/sse

Simply add either endpoint to your Claude.AI MCP configuration to start generating charts immediately.

Features

• 🎯 15+ Chart Types - Comprehensive chart library covering all major visualization needs
• 🔒 Type Safety - Full Zod schema validation for all chart configurations
• 🌐 Multiple Deployment Options - Local server, HTTP streaming, and SSE endpoints
• 🚀 Claude.AI Integration - Ready-to-use endpoints for Claude.AI integration
• 📊 Professional Charts - Support for financial, statistical, and business visualizations

Chart Types Supported

Basic Charts

• Bar Chart - Traditional bar charts with multiple datasets
• Line Chart - Line charts with customizable styling and fill options
• Pie Chart - Pie charts with hover effects and custom colors
• Radar Chart - Multi-axis radar charts for comparative analysis
• Polar Area Chart - Radial area charts for cyclical data

Advanced Charts

• Doughnut Chart - Enhanced pie charts with center labels and semi-circle support
• Scatter Plot - X/Y coordinate plotting with optional trend lines
• Bubble Chart - Three-dimensional data visualization with bubble sizes
• OHLC Chart - Financial candlestick charts with volume and indicators

Specialized Charts

• Violin Plot - Statistical distribution visualization
• Gauge Chart - Customizable gauge meters with thresholds
• Radial Gauge - Simple radial progress indicators
• Progress Bar - Linear progress indicators
• Sparkline - Minimal trend visualization
• Sankey Diagram - Flow and process visualization

Quick Start

Local Development

1. Clone the repository

   git clone https://github.com/KamranBiglari/mcp-server-chart.git
   cd mcp-server-chart
   

2. Install dependencies

   npm install
   

3. Build the project

   npm run build
   

4. Run the server

   npm start
   

Usage Examples

Basic Bar Chart

{
  "type": "bar",
  "data": {
    "labels": ["January", "February", "March", "April", "May"],
    "datasets": [
      { "label": "Sales", "data": [50, 60, 70, 180, 190] },
      { "label": "Expenses", "data": [100, 200, 300, 400, 500] }
    ]
  }
}

Financial OHLC Chart

{
  "type": "ohlc",
  "data": {
    "datasets": [
      {
        "label": "MSFT",
        "data": [
          {"x": 1459468800000, "o": 18.23, "h": 19.36, "l": 18.18, "c": 19.31}
        ],
        "color": {"up": "#26a69a", "down": "#ef5350", "unchanged": "#999"}
      }
    ]
  }
}

Advanced Doughnut Chart

{
  "type": "doughnut",
  "data": {
    "labels": ["Complete", "Remaining"],
    "datasets": [{"data": [75, 25], "backgroundColor": ["#4CAF50", "#E0E0E0"]}]
  },
  "options": {
    "circumference": 3.14159,
    "rotation": 3.14159,
    "plugins": {
      "doughnutlabel": {
        "labels": [{"text": "75%", "font": {"size": 24}}]
      }
    }
  }
}

Scatter Plot

{
  "type": "scatter",
  "data": {
    "datasets": [
      {
        "label": "Dataset 1",
        "data": [
          {"x": 2, "y": 4},
          {"x": 3, "y": 3},
          {"x": 5, "y": 8}
        ]
      }
    ]
  }
}

Configuration

MCP Client Configuration

Add to your MCP client configuration:

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

Claude.AI Configuration

For Claude.AI integration, add one of these endpoints:

{
  "mcpServers": {
    "chart-server": {
      "url": "https://chart.mcp.cloudcertainty.com/mcp"
    }
  }
}

Development

Project Structure

src/
├── charts/           # Chart type definitions
│   ├── bar.ts       # Bar chart schema
│   ├── line.ts      # Line chart schema
│   ├── ohlc.ts      # OHLC chart schema
│   └── ...          # Other chart types
├── utils/           # Utility functions
│   ├── index.ts     # Zod to JSON schema conversion
│   └── schema.ts    # Common schema definitions
└── index.ts         # Main MCP server

Building

npm run build      # Build TypeScript
npm run dev        # Development mode with watch
npm run lint       # Run linting

Testing

npm test           # Run test suite
npm run test:watch # Watch mode testing

Chart Type Reference

Chart Type	Use Case	Data Format
bar	Categorical comparisons	{labels: string[], datasets: {data: number[]}[]}
line	Trends over time	{labels: string[], datasets: {data: number[]}[]}
pie	Part-to-whole relationships	{labels: string[], datasets: {data: number[]}[]}
doughnut	Enhanced pie charts	{labels: string[], datasets: {data: number[]}[]}
radar	Multi-variable comparison	{labels: string[], datasets: {data: number[]}[]}
polarArea	Cyclical data	{labels: string[], datasets: {data: number[]}[]}
scatter	Correlation analysis	{datasets: {data: {x: number, y: number}[]}[]}
bubble	Three-dimensional data	{datasets: {data: {x: number, y: number, r: number}[]}[]}
ohlc	Financial data	{datasets: {data: {x: number, o: number, h: number, l: number, c: number}[]}[]}
violin	Statistical distributions	{labels: string[], datasets: {data: number[][]}[]}
gauge	KPI dashboards	{datasets: {value: number, data: number[]}[]}
sankey	Process flows	{datasets: {data: {from: string, to: string, flow: number}[]}[]}

API Reference

Tools Available

All chart types are available as MCP tools with the following pattern:

• Tool name matches chart type (e.g., bar, line, ohlc)
• Input schema validates chart configuration
• Returns generated chart data

Schema Validation

Every chart type includes comprehensive Zod schemas that validate:

• Chart type and structure
• Data format and types
• Styling options
• Chart-specific configurations

Contributing

1. Fork the repository
2. Create a feature branch
3. Add your chart type or improvement
4. Include tests and documentation
5. Submit a pull request

License

MIT License - see LICENSE file for details

Support

• 📚 Documentation: Check the inline schema documentation
• 🐛 Issues: Report bugs via GitHub Issues
• 💬 Discussions: Use GitHub Discussions for questions
• 🌐 Live Demo: Try the public endpoints with Claude.AI

Roadmap

• Real-time data binding
• Custom theme support
• Export formats (PNG, SVG, PDF)
• Animation and interaction options
• Dashboard layout compositions