lambdacad-mcp
MCP server for any AutoLISP-capable CAD, offering AI drafting with 2D plus 3D solids.
Summary rewritten from the vendor site because the catalog version did not match it.
What it does and how it connects
lambdacad-mcp is an MCP server that lets AI draw in any AutoLISP-capable CAD, with no COM, no SDK, and no plugins. The reference adapter drives BricsCAD on Linux, which the README describes as the first MCP server for a professional DWG CAD on Linux. The server works through an AutoLISP file bridge: it writes LISP expressions to a file, triggers a small MCP command inside the CAD, and reads the result back, which unlocks 2D drafting and 3D solid modeling including booleans.
Because the bridge is plain AutoLISP plus standard DXF entmake and AutoCAD-compatible commands, the README says it is portable by construction to AutoCAD, ARES Commander, ZWCAD, GstarCAD, and the IntelliCAD family by swapping the autoload file name and the keystroke trigger. The README demo draws a DN80 flange in BricsCAD, front view with bolt circle, hatched section, dimensions, leader, and title block, then models the same flange as a 3D solid, in about 20 seconds and 12 tool calls. It also exports STL.
The project is listed in the MCP registry. Python 3.10 or later is required, and the server runs on Linux.
Alternatives
Compare side by side- dsh-fusion360
Drives Fusion 360 from DeepSeek Harness through an MCP bridge, rather than driving an AutoLISP CAD through a LISP file bridge.
- solidifai
A desktop build123d studio with a live viewport, rather than an MCP server that drives a DWG CAD.
- harnesscad
A verifier-first harness for CAD operation streams, rather than an MCP server that draws in a running CAD.
- FreeCAD
The FreeCAD application itself, while lambdacad-mcp is the MCP layer that drives an AutoLISP CAD.
- OpenSCAD
The OpenSCAD code CAD application itself, while lambdacad-mcp drives a DWG CAD through AutoLISP.
Sources
Not verified
- Pricing: none stated on the repo.
- Real user voices: no real linked post read for this page; the only open issue is a third-party config generator note.
- Related Error Index entries: no matching entry verified.
- The one-liner was rewritten to drop the tool count: the repository description says 105 tools while the README badge says 128, so no tool count is stated.
- A named individual builder beyond the repository owner handle Psalmustrack
Last verified November 6, 2026. Listings are informational. The evidence score measures public, verifiable evidence and is not an endorsement or a compatibility claim.