MCP server for running ngspice simulations via spicelib
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spicelib-mcp
A thin MCP server that wraps ngspice for circuit simulation. The heavy lifting — simulator invocation, .raw file parsing, and multi-simulator abstraction — is done by spicelib, which deserves most of the credit. This project is purely a transport layer that exposes spicelib's functionality as MCP tools for use with Claude Code.
Primary use case: behavioral model fitting — run simulations, compare against real measurements, iterate on SPICE models.
Tools
run_ac_analysis— AC frequency sweep, returns magnitude/phase datarun_transient— transient simulation, returns time-domain waveformsrun_dc_op— DC operating point analysis
Results are saved as .npz files alongside the netlist for further analysis and plotting.
Requirements
- Python 3.10+
- ngspice installed on PATH (
sudo apt install ngspice)
License
GPL-3.0-or-later
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