mcltspice

MCP server for LTspice circuit simulation automation on Linux. Drives LTspice via Wine in batch mode, parses binary .raw results, and exposes 37 tools for end-to-end circuit design workflows.

Quick Start

# Install and run
uvx mcltspice

# Add to Claude Code
claude mcp add mcltspice -- uvx mcltspice

# Local development
claude mcp add mcltspice -- uv run --directory /path/to/mcltspice mcltspice

Requirements

• Linux with Wine installed
• LTspice extracted from the Windows installer (see Setup)
• Python 3.11+

Tools

Simulation

Tool	Description
simulate	Run simulation on a .asc schematic
simulate_netlist	Run simulation on a .cir / .net netlist
parameter_sweep	Sweep a parameter across a range of values
temperature_sweep	Run simulations at different temperatures
monte_carlo	Monte Carlo analysis with component tolerances
optimize_circuit	Automatically optimize component values to hit target specs
tune_circuit	Measure performance and suggest parameter adjustments

Waveform Extraction & Visualization

Tool	Description
get_waveform	Extract signal data from a .raw file
list_simulation_runs	List runs in a stepped/Monte Carlo simulation
evaluate_waveform_expression	Evaluate math expressions on waveforms (V*I, dB, etc.)
export_csv	Export waveform data to CSV
plot_waveform	Generate SVG plots from simulation results

Signal Analysis

Tool	Description
analyze_waveform	FFT, THD, RMS, settling time, and more
measure_bandwidth	Measure -3dB bandwidth from AC analysis
get_operating_point	Extract DC operating point (.op) results
get_transfer_function	Extract .tf (transfer function) results

Noise Analysis

Tool	Description
analyze_noise	Comprehensive noise analysis from .noise simulation
get_spot_noise	Noise spectral density at a specific frequency
get_total_noise	Integrated RMS noise over a frequency band

Stability & Power

Tool	Description
analyze_stability	Gain margin and phase margin from AC loop gain
analyze_power	Power metrics from voltage and current waveforms
compute_efficiency_tool	Power conversion efficiency

Schematic & Netlist

Tool	Description
read_schematic	Parse schematic components and nets
edit_component	Modify component values in a schematic
diff_schematics	Compare two schematics and show changes
run_drc	Design rule checks on a schematic
create_netlist	Build a SPICE netlist programmatically
create_from_template	Create a circuit from a pre-built template
generate_schematic	Generate a graphical .asc schematic from a template
read_touchstone	Parse Touchstone S-parameter files (.s1p, .s2p)

Library & Templates

Tool	Description
list_templates	Available circuit templates with parameters and defaults
list_symbols	Browse LTspice's 6500+ component symbols
list_examples	Browse 4000+ example circuits
get_symbol_info	Pin details and attributes for a component symbol
search_spice_models	Search .model definitions in the library
search_spice_subcircuits	Search .subckt definitions (op-amps, ICs, etc.)
check_installation	Verify LTspice and Wine setup

Resources

URI	Description
ltspice://symbols	All component symbols by category
ltspice://examples	All example circuits
ltspice://status	Installation status
ltspice://templates	All circuit templates with parameters
ltspice://template/{name}	Detail for a specific template

Prompts

Prompt	Description
design_filter	Walk through filter design (type, topology, specs)
analyze_power_supply	Guide through power supply analysis
debug_circuit	Systematic circuit debugging workflow
optimize_design	Iterative design optimization
monte_carlo_analysis	Statistical yield analysis
circuit_from_scratch	Build a circuit from a description
troubleshoot_simulation	Diagnose simulation errors

LTspice Setup

Extract LTspice from the Windows MSI installer:

# Download LTspice64.msi from analog.com
cd /path/to/downloads
7z x LTspice64.msi -oltspice
cd ltspice
7z x disk1.cab

# Set up Wine prefix
export WINEPREFIX=$PWD/.wine
export WINEARCH=win64
wineboot --init

Set LTSPICE_DIR to point at your extracted directory, or use the default ~/claude/ltspice/extracted/ltspice.

Repository

git.supported.systems/MCP/mcltspice

License

MIT