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.

---

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

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

3. 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

---

<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>