Kiln MCP Server

The open-source MCP server for 3D printing. Kiln lets AI agents (Claude Desktop, Claude Code, Codex, or any custom MCP client) drive real 3D printers end to end - Bambu Lab, Creality, Prusa, Elegoo, Voron, Sovol, AnkerMake, Artillery, FlashForge, QIDI, RatRig, and SparkX, over OctoPrint, Moonraker/Klipper, PrusaLink, and Direct USB. It runs locally over stdio via the published package.

People connecting design tools to Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-08-25 · ★ 48 · #8 OF 74 MAINTAINED DESIGN · VERIFIED 2026-08-25

AGPL-3.0 · Python servers · how we verify → /methodology

01 · Install Kiln

before you install - you'll need

Set KILN_PRINTER_HOST, KILN_PRINTER_API_KEY, KILN_PRINTER_TYPE, KILN_OPENROUTER_KEY, KILN_BAMBU_TLS_MODE, KILN_BAMBU_TLS_FINGERPRINT, KILN_AUTH_ENABLED, KILN_AUTH_KEY, KILN_MCP_AUTH_TOKEN before connecting.

Claude Code

claude mcp add codeofaxel-kiln -- uvx kiln3d

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "codeofaxel-kiln": {
      "command": "uvx",
      "args": [
        "kiln3d"
      ]
    }
  }
}

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 AGPL-3.0 - declared in the repository

pypi package kiln3d - check the name against the project README before installing (PyPI has no namespace ownership)

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

03 · What Kiln can do

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

Latest releases

v1.4.1.1 · 2026-08-19

Added · Connecting a printer to the web app now walks itself. On a machine with · no printer saved yet, kiln bridge enable scans your network, offers the · printer it finds, asks only the details that printer needs…

v1.4.1 · 2026-08-19

Added · Rebuild a saved design in one step. rebuild_design re-runs a design's · saved build recipe: parametric designs re-derive from their OpenSCAD source · and parameters, imported models re-slice their saved parts.…

v1.4.0 · 2026-08-15

Added · Point a print at the printer you mean (Business+). Starting a print, · uploading a file, checking readiness and setting temperatures all take a · printer name now. Naming none still means your default, and each…

04 · Who maintains Kiln

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

05 · Facts

repository: github.com/codeofaxel/kiln
website: https://kiln3d.com/?utm_source=mcp-registry&utm_medium=listing
category: design - ranked #8 of 74 actively-maintained design servers as of 2026-08-25.
release cadence: 10+ releases in the last 90 days (latest 2026-08-19)
registry: io.github.codeofaxel/kiln (active, first published 2026-02-20 · 30 versions)
packages: pypi:kiln3d

06 · Kiln FAQ

What is Kiln?

Is Kiln still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-25 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

How do I install Kiln?

Run `uvx kiln3d`. The README documents 9 environment variables (KILN_PRINTER_HOST, KILN_PRINTER_API_KEY, KILN_PRINTER_TYPE…) to set first. Set KILN_PRINTER_HOST, KILN_PRINTER_API_KEY, KILN_PRINTER_TYPE, KILN_OPENROUTER_KEY, KILN_BAMBU_TLS_MODE, KILN_BAMBU_TLS_FINGERPRINT, KILN_AUTH_ENABLED, KILN_AUTH_KEY, KILN_MCP_AUTH_TOKEN before connecting. You can also paste the ready-made client config above.

Does Kiln run locally?

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

07 · Alternatives to Kiln

Alternatives to Kiln

Maintained design servers if Kiln isn't the fit.

More design MCP servers · Substack MCP Server · Decantr Ai MCP Server · SmartCLI - drive terminal TUIs · Editmamei · BrandKit MCP

More Python MCP servers · Codesurface · Unity API Documentation · Unreal Engine API Documentation · Studiomcphub · Growmos · see all