Open SCAD MCP Server

An MCP (Model Context Protocol) server that renders PNG previews and STL geometry from OpenSCAD (SCAD) source code. It is designed to support iterative, agent-driven CAD workflows, where models can be previewed visually and exported for downstream use (e.g. fabrication, simulation, or inspection). It runs locally over stdio via the published package.

People connecting this server to Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

VERIFIED ACTIVE

LAST COMMIT 2026-02-13 · ★ 3 · #566 OF 848 MAINTAINED OTHER · VERIFIED 2026-08-25

MIT · TypeScript servers · how we verify → /methodology

01 · Install Open SCAD

Claude Code

claude mcp add fboldo-openscad-mcp-server -- npx -y openscad-mcp-server

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "fboldo-openscad-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "openscad-mcp-server"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package openscad-mcp-server - unscoped; check the name against the project README before installing

registry namespace io.github.fboldo is GitHub-verified and matches the repo owner

03 · What Open SCAD can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

An agent gets 2 documented tools across render, export, including render_scad_png, export_scad_stl.

The 2 tools it gives your agent

Extracted from the project's README - what OpenSCAD lets an agent do.

render_scad_png: - Renders a PNG preview image from SCAD source.
export_scad_stl: - Exports an STL generated from SCAD source.

Limitations (from the README)

- Performance: Rendering complex SCAD models can be slow, especially in a WASM environment. - Feature support: Not all OpenSCAD features may be fully supported or may have limitations in the WASM version. - Fonts: Text rendering is not currently supported. Support is planned for a future release.

Latest releases

1.0.5 · 2026-02-13

add interative modeling skill · Improve rendering performance using manifold backend · New Contributors · @fboldo made their first contribution in

1.0.4 · 2026-02-11

1.0.3 · 2026-02-11

04 · Who maintains Open SCAD

OpenSCAD is maintained by fboldo. It's the only MCP server we track from this author; the repo dates to Feb 2026.

05 · Facts

repository: github.com/fboldo/openscad-mcp-server
website: https://github.com/fboldo/openscad-mcp-server
category: other - ranked #566 of 848 actively-maintained other servers as of 2026-08-25.
registry: io.github.fboldo/openscad-mcp-server (active, first published 2026-02-11 · 2 versions)
packages: npm:openscad-mcp-server

06 · Open SCAD FAQ

What is Open SCAD?

Is Open SCAD still maintained?

Yes - as of 2026-08-25, its last commit was 2026-02-13. We re-verify nightly.

How do I install Open SCAD?

Run `npx -y openscad-mcp-server`. You can also paste the ready-made client config above.

Does Open SCAD run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Open SCAD

Alternatives to Open SCAD

Maintained other servers if Open SCAD isn't the fit.

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