# 3D CAD Converter

Bridges your coding assistant to the desktop 3D CAD Converter on Windows. Converts mechanical and 3D mesh files like STEP, STL, and glTF directly from prompts.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI
- Author: contentasoftware
- License: MIT · policy=link-only · description only; the file stays with the author
- Source: https://github.com/contentasoftware/mcp-launcher/tree/HEAD/packages/cad-converter-mcp
- Updated: 2026-10-24
- HTML: https://affpapa.org/en/nevibecode/mcp/3d-cad-converter

## What it does

This launcher runs the desktop application's internal MCP engine via stdio. It looks for `cadconvert.exe` in `%LOCALAPPDATA%\Programs\CadConverter` or your system `PATH`. Connected agents receive tools like `convert_cad`, `detect_format`, `get_file_info`, `list_formats`, and `get_license_status`. If the desktop executable is missing, the launcher serves only `get_started` with setup steps.

Operation requires Windows 10 or 11. Conversions fail if the desktop app is not on your machine. The trial provides 10 full-quality exports during the first 30 days. Afterwards, STEP, IGES, and BREP conversions drop to draft meshing with an added watermark. The desktop software collects anonymous telemetry, which you can disable inside its settings.

## Requirements
- Needs: Node.js (commands run via npx)

## Install

### Claude Code (native platform)

**Platform CLI**
```bash
claude mcp add cad-converter -- npx -y @contentasoft/cad-converter-mcp
```

### Codex

**Platform CLI**
```bash
codex mcp add cad-converter-mcp -- npx -y @contentasoft/cad-converter-mcp
```

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "cad-converter-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "@contentasoft/cad-converter-mcp"
            ]
        }
    }
}
```

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "cad-converter-mcp": {
            "type": "stdio",
            "command": "npx",
            "args": [
                "-y",
                "@contentasoft/cad-converter-mcp"
            ]
        }
    }
}
```

### Gemini CLI

**Platform CLI**
```bash
gemini mcp add cad-converter-mcp npx -y @contentasoft/cad-converter-mcp
```

## When to use it
- convert STEP and IGES engineering files into STL or glTF meshes
- inspect 3D file formats and metadata directly in your editor
- batch prepare OBJ and 3MF assets for printing or rendering

## Example prompts
- Convert mechanical_part.step to gltf format for web display
- Detect the file format of model.iges and inspect its geometry metadata
- Check 3D CAD Converter license status and list available export extensions

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From the same set: [contentasoftware/mcp-launcher](https://affpapa.org/en/nevibecode/by/contentasoftware/mcp-launcher.md) — 4 cards

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