@mindstone-engineering/mcp-server-napkin

Napkin AI visual generation MCP server for Model Context Protocol hosts. Generate professional visuals — diagrams, infographics, and illustrations — from text descriptions, check generation status, and download results through a standardised MCP interface.

Requirements

• Node.js 20+
• npm

Quick Start

Install & build

cd <path-to-repo>/connectors/napkin
npm install
npm run build

npx (once published)

npx -y @mindstone-engineering/mcp-server-napkin

Local

node dist/index.js

Configuration

Environment variables

• NAPKIN_API_KEY — Napkin AI API key
• MCP_WORKSPACE_PATH — optional workspace path for saving generated visuals
• MCP_HOST_BRIDGE_STATE — optional path to a host bridge state file used for credential management
• MINDSTONE_REBEL_BRIDGE_STATE — backwards-compatible alias for MCP_HOST_BRIDGE_STATE
• NAPKIN_REQUEST_TIMEOUT_MS — optional override (positive integer ms, max 30 min) for the outbound HTTP request timeout applied to Napkin API, host-bridge, and download calls. Default: 60000 (60s). Raise this if you see TIMEOUT errors on slow submits or large downloads; lower it if you want tighter bounds.

Host configuration examples

Claude Desktop / Cursor

{
  "mcpServers": {
    "Napkin": {
      "command": "npx",
      "args": ["-y", "@mindstone-engineering/mcp-server-napkin"],
      "env": {
        "NAPKIN_API_KEY": "your-api-key"
      }
    }
  }
}

Local development (no npm publish needed)

{
  "mcpServers": {
    "Napkin": {
      "command": "node",
      "args": ["<path-to-repo>/connectors/napkin/dist/index.js"],
      "env": {
        "NAPKIN_API_KEY": "your-api-key"
      }
    }
  }
}

Tools (4)

Configuration

• configure_napkin_api_key — Configure the Napkin AI API key

Generation

• napkin_generate_visual — Generate a professional visual from text
• napkin_check_status — Check the status of a visual generation request
• napkin_download_visual — Download a generated visual file to disk

Licence

FSL-1.1-MIT — Functional Source License, Version 1.1, with MIT future licence. The software converts to MIT licence on 2030-04-08.