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Enables natural language control of Autodesk Fusion 360, providing 64 CAD tools for sketching, parametric modeling, and the generation of JIS standard components like bolts, bearings, and O-ring grooves. Supports importing SVG vector graphics into Fusion 360 to facilitate 3D modeling workflows from 2D designs.

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

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

Installation

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

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