build123d MCP Server

by pzfreo Your server? Claim it

local only

build123d MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 1 766 installs a week from pypi. Last commit 4 Sep 2026.

AI-driven 3D CAD via build123d: execute, render, measure, and export geometry interactively.

Installs per day peak 777 · avg 316 · +29% w/w

a month agotoday

1 766

Installs / week

pypi · build123d-mcp

Stars

59 open issues

4 Sep 2026

Last commit

0 releases in 90 days

Apache-2.0

License

Python

What the code does

We read the source, 18 h ago · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Unsafe deserialization src/build123d_mcp/_vtk_render_subprocess_worker.py:22, [пакет] src/build123d_mcp/_vtk_render_subprocess_worker.py:22, src/build123d_mcp/tools/render.py:506 и ещё 1

        args = pickle.load(f)

Runs an external command src/build123d_mcp/tools/_bounded.py:115, src/build123d_mcp/tools/locate.py:264, src/build123d_mcp/tools/render.py:35 и ещё 7

            proc = subprocess.run(

Builds a file path from a variable src/build123d_mcp/tools/_bounded.py:97, [пакет] src/build123d_mcp/tools/_bounded.py:97, src/build123d_mcp/tools/render.py:464 и ещё 1

    steps = {label: os.path.join(work, f"{i}.step") for i, label in enumerate(shape_map)}

Executes code built at runtime src/build123d_mcp/tools/library.py:160, [пакет] src/build123d_mcp/tools/library.py:160, src/build123d_mcp/tools/resolve.py:234 и ещё 3

    exec(compile(source, entry["path"], "exec"), namespace)  # noqa: S102

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add build123d-mcp -- uvx build123d-mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "build123d-mcp": {
      "args": [
        "build123d-mcp"
      ],
      "command": "uvx"
    }
  }
}

~/.codex/config.toml

[mcp_servers.build123d-mcp]
command = "uvx"
args = ["build123d-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "build123d-mcp": {
      "args": [
        "build123d-mcp"
      ],
      "command": "uvx"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "build123d-mcp": {
      "args": [
        "build123d-mcp"
      ],
      "command": "uvx"
    }
  }
}

Alternatives to build123d MCP

same job, measured the same way

N8n MCP

by ratamaha-git

MCP server for n8n: generate, lint, explain failed executions, drive live n8n via REST.

120 installs/wk local only

SearchStack

by searchstack

Agent-driven search: build, import, tune, search, and score result quality — all over MCP.

answering

Ceraph

by ceraph

MCP server for agent-driven React Native and Expo development and mobile testing

656 installs/wk local only

Vibe MCP — Real Chrome, Remotely

by vibetechnologies

Drive your real, logged-in Chrome from any MCP client — even from a remote machine, no inbound port.

133 installs/wk answering

Aiterm MCP

by kitepon-rgb

Claude Code drives Codex CLI's interactive TUI and durable tmux terminals over MCP.

local only

Decixa MCP

by koki-socialgist

Decixa MCP Server — intent-driven API discovery and selection for AI agents.

local only

FableCut

by ronak-create

Zero-dependency browser video editor AI agents drive via a JSON timeline over MCP; ffmpeg export.

local only

V12 Dfs

by jorgeperez0825

AI-driven DFS lineup optimizer for MLB & NBA — build FanDuel & DraftKings lineups via MCP.

34 tools answering

build123d MCP — questions

Answers built from our own checks of this server.

Why is there no uptime for build123d MCP?

build123d MCP runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the pypi package build123d-mcp was installed 1 766 times last week.

How do I connect build123d MCP?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls build123d-mcp straight from pypi; nothing to host, nothing to sign up for.

How many people use build123d MCP?

The pypi package build123d-mcp was installed 1 766 times in the last week. Week over week that is +29%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is build123d MCP open source?

Yes — it is published under the Apache-2.0 licence, written in Python, 88 stars on GitHub and 59 open issues. The source link is on this page, so you can read exactly what it does with your data before you connect it.