MCP Servers

Chart-Output MCP Server

Enables AI agents to generate and render charts as PNG, SVG, or WebP images directly in chat interfaces. Supports Chart.js specifications and natural language descriptions for creating visualizations from data.

README

Chart-Output MCP Server

Render charts as PNG, SVG, or WebP images directly from Claude, Cursor, Windsurf, or any MCP-compatible AI agent.

Ask your AI: "Generate a bar chart showing Q1–Q4 revenue" — it calls Chart-Output and returns the image inline.

What it produces

Ask your AI agent to generate a chart. This is what comes back.

Examples

Ready-to-use chart configs in /examples. Copy any file, swap in your data, POST to the API.

Install

Add to your mcp.json:

{
  "mcpServers": {
    "chart-output": {
      "command": "npx",
      "args": ["@chartoutput/mcp"],
      "env": {
        "CHART_OUTPUT_API_KEY": "pk_test_YOUR_KEY"
      }
    }
  }
}

Get a free API key at chart-output.com — no credit card required.

Tools

Tool	Description
`render_chart`	Chart.js-style labels/datasets → inline image (optional `extensions` for partial dashboard fields)
`render_chart_url`	Same as `render_chart` → CDN URL instead of bytes
`render_card`	Full card composition JSON → inline image (header, KPI strip, footer, theme, `backgroundColor`, etc.); spec is POSTed verbatim to `/api/v1/render`
`render_chart_ai`	Natural language + data → image (Pro/Business key required)

Example

Once installed, just ask your AI agent:

"Create a line chart showing monthly active users growing from 12k in January to 28k in December"

The agent calls render_chart, render_card, or render_chart_ai and returns the image directly in chat. No code required. Use render_card for branded dashboard layouts (dark theme, KPI row, footer).

API Key

Sign up at chart-output.com
Go to Dashboard → API Keys → Create key
Add it to your mcp.json as shown above

Free trial includes 500 renders. No credit card required.

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