chartforge-mcp

ChartForge MCP Server

Generate stunning, publication-quality charts and diagrams from natural language — directly inside Claude.

Setup

1. Get a Free API Key

Get your free API key (10 charts/day, no credit card): chartforgeai.com/pricing

Or via command line:

curl -s -X POST https://chartforgeai.com/api/register \
  -H "Content-Type: application/json" \
  -d '{"email": "[e-mail]"}'

2. Claude Desktop

Add this to your claude_desktop_config.json:

{
  "mcpServers": {
    "chartforge": {
      "command": "npx",
      "args": ["chartforge-mcp"],
      "env": {
        "CHARTFORGE_API_KEY": "your_api_key_here"
      }
    }
  }
}

Environment Variables

Variable	Required	Description
CHARTFORGE_API_KEY	Yes	Your API key from chartforgeai.com
CHARTFORGE_API_URL	No	Custom API URL (default: https://chartforgeai.com)

Tools

generate_chart

Generate a chart from a natural language description.

Parameters:

• prompt (required): Description of the chart
• style (optional): Style preset — midnight, frost, ember, minimal, corporate, neon, light
• width (optional): Width in pixels (default: 1200)
• height (optional): Height in pixels (default: 800)

refine_chart

Modify a previously generated chart.

Parameters:

• chartId (required): Chart ID from a previous generation
• modification (required): What to change

list_styles

List available style presets with descriptions.

Examples

"Create a bar chart showing quarterly revenue from $2M to $18M over 3 years"

"System architecture diagram for a microservices backend"

"Sankey diagram of marketing budget flow through channels to conversions"