oniondas/SpiceMCP

LTspice MCP server where the server owns the optimization state, not the LLM.

About SpiceMCP

LTspice MCP server where the server owns the optimization state, not the LLM.

The model contributes topology and strategy. Candidate identity, simulation history, dedup, best so far, sensitivities and rollback all live in SQLite and are re derived on every call, so a long optimization can't drift into remembering a circuit that never existed.

Prototype Status & Live Example SpiceMCP is currently an experimental prototype.

Below is a demonstration of what SpiceMCP generated and analyzed autonomously for Chua's Chaotic Circuit showcasing automated .asc schematic generation, batch LTspice simulations, binary .raw waveform parsing, parameter sweeps, and visualization:

Schematic Rendering (renderschematic) 3D Double-Scroll Attractor :---: :---:

Vector schematic generated from .asc in classic style 3D phase-space trajectory $(v{C1}, v{C2}, iL)$ parsed from binary .raw

Bifurcation Route to Chaos (simulatesweep) Sensitivity to Initial Conditions (Butterfly Effect) :---: :---:

Multi-point parameter sweep capturing period-doubling cascades Lyapunov divergence tracking $1\,\mu\text{V}$ initial condition perturbations

2D Phase Plane Portraits & Orbital Density Nonlinear Diode (NDR) I-V Curve :---: :---:

Orthogonal projections ($V{C1}-V{C2}, V{C1}-IL$) with orbital density Piecewise-linear Negative Differential Resistance ($Ga, Gb$) DC sweep

LTspice is auto-detected (AppData\Local\Programs\ADI\LTspice\LTspice.exe, Program Files\LTC\LTspiceXVII\XVIIx64.exe, …). Override with LTSPICEEXE.

From the project README.

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