text-to-model

TextToModel

Turn natural language into 3D models in Fusion 360.

An MCP (Model Context Protocol) server add-in that connects Claude to Autodesk Fusion 360 — giving you 64 CAD tools controllable through plain text.

!demo

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Highlights

• Natural Language → CAD — Describe what you want, Claude builds it in Fusion 360
• 64 MCP Tools — Sketches, extrudes, fillets, sweeps, lofts, booleans, patterns, and more
• JIS Standard Parts — Generate bolts, nuts, screws, washers, keyways, bearings, and O-rings with accurate JIS dimensions (ISO equivalents planned)
• Full Parametric Workflow — Sketches → features → modifications → export (STEP/STL)
• Works with Claude Desktop & Claude Code

Quick Start

Prerequisites

• Autodesk Fusion 360
• Claude Desktop or Claude Code
• Node.js (for npx)

Installation

1. Clone this repo into Fusion 360's add-in directory:

# Windows
git clone https://github.com/mikan-atomoki/text-to-model.git "%APPDATA%\Autodesk\Autodesk Fusion 360\API\AddIns\TextToModel"

# macOS
git clone https://github.com/mikan-atomoki/text-to-model.git ~/Library/Application\ Support/Autodesk/Autodesk\ Fusion\ 360/API/AddIns/TextToModel

1. In Fusion 360: UTILITIES → ADD-INS → Scripts and Add-Ins → Run TextToModel

1. Connect to Claude:

Claude Desktop — add to your MCP config (claude_desktop_config.json):

{
  "mcpServers": {
    "fusion360": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "http://127.0.0.1:13405/sse"]
    }
  }
}

Claude Code — run:

claude mcp add fusion360-mcp --transport sse http://127.0.0.1:13405/sse

That's it. Open Claude and start modeling.

Examples

Create an M8x30 hex socket head bolt at the origin

Draw a 50mm × 30mm rectangle on the XY plane, extrude it 20mm,
and add a 3mm fillet to the top long edges

Draw a 20mm diameter circle, create a revolve, then add a keyway

Tool Categories (64 tools)

| Category | Count | Tools | |----------|-------|-------| | Sketch | 7 | circle, rectangle, line, arc, spline, polygon, create sketch | | Features | 4 | extrude, revolve, sweep, loft | | Modify | 6 | fillet, chamfer, shell, mirror, variable fillet, draft | | Patterns & Combine | 3 | circular/rectangular pattern, boolean combine | | JIS Fasteners | 4 | bolt, nut, screw, washer (with JIS standard dimensions) | | JIS Holes | 3 | threaded hole, counterbore, countersink | | Mechanical | 3 | keyway (B1301), bearing hole (B1520), O-ring groove (B2401) | | Construction | 4 | offset/angled/mid plane, construction axis | | Inspect | 5 | list edges/faces/sketches/planes, bounding box | | Surface | 4 | patch, thicken, offset, boundary fill | | Split | 2 | split body, split face | | Transform | 3 | move, scale, copy | | Import | 2 | SVG, DXF | | Constraints | 3 | geometric constraint, dimension, list entities | | Appearance | 2 | body color, rename body | | Utility | 9 | design info, list bodies/components, parameters, undo, export STEP/STL, execute code |

Architecture

Claude Desktop/Code ←→ MCP (HTTP/SSE) ←→ Bridge (CustomEvent) ←→ Fusion 360 API

The add-in runs an HTTP/SSE server inside Fusion 360. Claude sends tool calls via MCP protocol, and the bridge executes them on Fusion's main thread using a CustomEvent-based synchronization mechanism.

License

MIT

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<details> <summary>🇯🇵 日本語</summary>

Fusion 360 を Claude Desktop/Code から直接操作できる MCP サーバーアドイン。 テキストの指示だけで 3D モデリング・JIS 規格部品の生成が可能です。

64種類のMCPツールで、スケッチ作成・押し出し・フィレット・JIS ボルト生成など、幅広いCAD操作をテキスト指示で実行できます。

セットアップ方法や詳細は英語版をご参照ください。

</details>