3D CAD Converter

com.contenta-softwarev1.0.0Updated Oct 2, 2026

Convert STEP, IGES, STL, OBJ, FBX, glTF and 3MF files on your Windows PC, one file or a folder

VerifiedSTDIODesktop onlyFiles & Storage Media & Design

Overview

AI-generated overview

Lets an assistant convert 3D and CAD files such as STEP, IGES, STL, OBJ, FBX, glTF and 3MF on a Windows PC.

What it does: A small launcher that finds the 3D CAD Converter desktop app on your PC and runs the app's own MCP server over stdio. It exposes tools named convert_cad, detect_format, get_file_info and list_formats, so an assistant can convert a single file or a whole folder and inspect formats and file details. If the app is not installed, it serves only a get_started tool with download and install steps.
When to use it: Useful when you work with 3D or CAD files on Windows and want an assistant to convert them between formats or check what a file contains, without leaving the chat client. It is desktop-only and not meant for remote or non-Windows use.
Requirements: Windows 10 or 11 with the 3D CAD Converter desktop app installed (cadconvert.exe in %LOCALAPPDATA%\Programs\CadConverter or on PATH); the app has a free trial. Node.js is needed to run the npm launcher package @contentasoft/cad-converter-mcp via npx. No accounts, API keys, environment variables or headers are declared. First start downloads the package, which may exceed a client's default startup timeout.

Before you install

The app sends anonymous usage telemetry (tools run, MCP client, trial state) to ContentaSoft and can be turned off in the app's settings. During the trial some output is watermarked or limited; after the trial, tools that write files return a purchase link instead of running. Long conversions can exceed default client tool timeouts, and the app is told to stop a job when the client cancels it.

Installation

In SourceWeft

Open 3D CAD Converter in the dashboard and add it to a workspace.
Enable the server for the chats that should use its tools.

Desktop only via STDIO. STDIO servers start a local process, so they need the SourceWeft desktop host.

Other MCP clients

Follow the launch instructions in the repository.

README

3D CAD Converter MCP server

Lets an AI agent (Claude Code, Claude Desktop/Cowork, Codex, Cursor, VS Code and other MCP clients) use 3D CAD Converter on your Windows PC: converting STEP, IGES, STL, OBJ, FBX, glTF, 3MF and other 3D/CAD files.

3D CAD Converter is a Windows 10/11 desktop app with a free trial: https://www.contenta-software.com/3dcadconverter/download.php

How it works

This package is a small launcher. It finds 3D CAD Converter on your PC (cadconvert.exe, installed per-user in %LOCALAPPDATA%\Programs\CadConverter or on your PATH) and runs the app's own MCP server (cadconvert serve) over stdio. Tools: convert_cad, detect_format, get_file_info, list_formats.

If the app is not installed yet, the launcher serves a single get_started tool that gives your agent the download link and the install steps instead.

Add it to your client

Claude Code (Windows):

Claude Desktop, Cursor and other clients that use mcpServers (JSON):

json

{  "mcpServers": {    "cad-converter": { "command": "cmd", "args": ["/c", "npx", "-y", "@contentasoft/[email protected]"] }  }}

{  "mcpServers": {    "cad-converter": { "command": "cmd", "args": ["/c", "npx", "-y", "@contentasoft/[email protected]"] }  }}

VS Code (.vscode/mcp.json, note the servers key):

json

{  "servers": {    "cad-converter": { "type": "stdio", "command": "cmd", "args": ["/c", "npx", "-y", "@contentasoft/[email protected]"] }  }}

{  "servers": {    "cad-converter": { "type": "stdio", "command": "cmd", "args": ["/c", "npx", "-y", "@contentasoft/[email protected]"] }  }}

Codex (codex mcp add cad-converter -- cmd /c npx -y @contentasoft/[email protected], or ~/.codex/config.toml):

toml

[mcp_servers.cad-converter]command = "cmd"args = ["/c", "npx", "-y", "@contentasoft/[email protected]"]startup_timeout_sec = 60tool_timeout_sec = 3600

[mcp_servers.cad-converter]command = "cmd"args = ["/c", "npx", "-y", "@contentasoft/[email protected]"]startup_timeout_sec = 60tool_timeout_sec = 3600

The first start downloads this small package, which can take longer than a client's default startup timeout (Codex: 10 s; Claude Code: set MCP_TIMEOUT); after that it starts at once. Long jobs such as video encodes can exceed a client's default tool timeout too (Codex: 60 s; Claude Code: MCP_TOOL_TIMEOUT). The app is told to stop a job when the client cancels it.

Once the app is installed you can also skip the launcher: "command": "cadconvert", "args": ["serve"].

What runs and what is sent

The launcher itself sends nothing over the network and writes nothing to disk. It starts cadconvert.exe.
The app works on local files on your PC. It sends anonymous usage telemetry (which tools ran, which MCP client connected, trial state) to ContentaSoft; turn it off in the app's settings. Privacy policy: https://www.contenta-software.com/3dcadconverter/privacy.php
During the trial some output is watermarked or limited; after the trial, tools that write files answer with a link to buy a license instead of running.

License

The launcher is MIT-licensed (see LICENSE). 3D CAD Converter itself is commercial software by ContentaSoft AB.

Source: packages/cad-converter-mcp/README.md at commit 06876ad

Tools

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Version history

v1.0.0LatestOct 2, 2026