wiring-diagram-mcp

An MCP (Model Context Protocol) server that generates electrical wiring diagrams for campers, boats, and off-grid setups.

Powered by VoltPlan.

• Generate complete wiring schematics as SVG or PNG
• Auto-generated protection components (shunt, main switch, low-voltage cutoff)
• Auto-calculated fuse sizes and wire gauges
• Support for solar, shore power, wind, generator, and alternator charging systems
• Available as hosted remote MCP, local stdio, or self-hosted HTTP server

No setup needed. Use the public MCP server directly:

Claude Code:

claude mcp add wiring-diagram --transport http https://mcp.voltplan.app/mcp

Claude Desktop (claude_desktop_config.json):

{
  "mcpServers": {
    "wiring-diagram": {
      "url": "https://mcp.voltplan.app/mcp"
    }
  }
}

Run locally without installation:

Claude Code:

claude mcp add wiring-diagram -- npx wiring-diagram-mcp

Claude Desktop (claude_desktop_config.json):

{
  "mcpServers": {
    "wiring-diagram": {
      "command": "npx",
      "args": ["wiring-diagram-mcp"]
    }
  }
}

npm install
npm run build
npm run start:http

The MCP server starts on http://localhost:3001/mcp.

| Environment Variable | Default | Description | |---|---|---| | VOLTPLAN_API_URL | https://voltplan.app | URL of the VoltPlan instance | | PORT | 3001 | Port for the HTTP server |

Generate a complete electrical wiring diagram.

Parameters:

| Parameter | Type | Required | Description | |---|---|---|---| | systemName | string | yes | Name of the electrical system | | batteries | array | no | Battery specifications | | loads | array | no | Electrical loads / consumers | | chargers | array | no | Chargers with power so