@chartroom/mcp

MCP server providing chart generation tools for AI assistants. Publishable to npm as @chartroom/mcp.

Tools

| Tool | Description | |------|-------------| | load_csv | Parse a CSV or Excel file, return column metadata | | render_chart | Validate and render a Vega-Lite spec to PNG via vega + resvg-js | | open_interactive | Open chart in browser with tooltips |

Running

From the monorepo (development):

cd packages/mcp && bun start

Via npx (published package):

npx @chartroom/mcp

MCP client configuration

For Claude Desktop or other MCP clients:

{
  "mcpServers": {
    "chartroom": {
      "command": "npx",
      "args": ["@chartroom/mcp@latest"]
    }
  }
}

Building

bun run build:mcp

Key files

| File | Purpose | |------|---------| | src/server.ts | MCP server entry point | | src/tools/load-csv.ts | CSV/Excel parsing tool | | src/tools/render-chart.ts | Spec validation + PNG rendering tool | | src/tools/open-interactive.ts | Browser-based interactive chart tool |