Naninovel MCP Server

Unity C# plugin that exposes Naninovel script authoring and playback controls via the Model Context Protocol (MCP), enabling AI assistants to write, edit, and test visual novel scripts.

Features

• Independent of Play Mode - Server runs in Editor at all times

• NaniScript CRUD - Create, read, update, delete script files

• Direct Playback - Skip title screen and jump to any script/label

• Input Simulation - Advance dialogue, simulate key presses

• Visual Verification - Screenshot capture for scene validation

Related MCP server: Union Unity MCP Server

Quick Start

1. Open Unity Editor

2. Server auto-starts (or open Window > Nani MCP > Server Status)

3. Connect your MCP client to http://localhost:6274

For Antigravity, add to your mcp_config.json:

{
  "mcpServers": {
    "nani-mcp": {
      "serverUrl": "http://localhost:6274"
    }
  }
}

Available Tools

Script File Operations (Editor Mode)

Playback Controls (Play Mode)

Scene & State (Play Mode)

Input Simulation (Play Mode)

Unity Editor Controls

Example: Writing a Script

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "write_script",
    "arguments": {
      "path": "events/new_scene.nani",
      "content": "; New Scene\n@back Classroom\n@char NaniChan\nNaniChan: Bonjour!"
    }
  }
}

Example: Quick Play

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "quick_play",
    "arguments": {
      "script": "events/new_scene",
      "resetState": true
    }
  }
}

Configuration

Open Window > Nani MCP > Server Status to configure:

• Port: WebSocket server port (default: 6274)

• Auto-start: Start server automatically when Editor opens

License

MIT License