LTspice MCP for macOS

MCP serverCommunity

A macOS-only LTspice server that runs simulations, builds and lints schematics, and renders real LTspice plots and schematic images. By xuio.

21 starsUpdated 6 months agoGitHub data from 5 Nov 2026

At a glance

Type: MCP server
Works with: LTspice
How it connects: Drives a running copy of the tool
Access: Can modify models
Tool versions: LTspice for macOS (/Applications/LTspice.app by default); server v1.27.0
Operating systems: macOS
Needs a LTspice licence: No
Transport: Local (stdio), Remote (HTTP)
AI clients documented: Claude Desktop
Licence: Not stated in its documentation
Language: Python

What it can do

Runs netlists and schematics in LTspice, with a job queue, history and cancellation.
Creates schematics from netlists or templates, then lints, auto-debugs and tidies their layout.
Reads .raw vectors and computes bandwidth, margins, rise and fall times and settling, and automates .meas and assertion checks.
Runs stepped and Monte Carlo studies and renders LTspice's own images of plots, schematics and symbols.

Limitations

macOS only, and needs Accessibility and screen-capture permissions for rendering and UI automation.
The repository has no licence file.
Runs by default as a local HTTP daemon on 127.0.0.1:8765; Claude Desktop reaches it through mcp-remote or a stdio mode.

Install

uv sync
./scripts/ltspice_mcp_daemon.sh start
./scripts/ltspice_mcp_daemon.sh status

Source: github.com/xuio/ltspice-mcp

{
  "mcpServers": {
    "ltspice-mcp": {
      "command": "/opt/homebrew/bin/npx",
      "args": ["-y", "mcp-remote", "http://127.0.0.1:8765/mcp"]
    }
  }
}

Source: github.com/xuio/ltspice-mcp

MCP servers and skills run code on your computer. Review the source before installing.

AI-generated models, drawings and results must be checked by a qualified engineer before use.