Show HN: SPICEBridge – MCP server for AI circuit design via ngspice
clanker-lover Wednesday, February 11, 2026
Built this in under 24 hours. I'm a self-taught EE and I got tired of the loop where I describe a circuit to Claude, then have to manually translate it into a netlist, run ngspice, parse output, check specs, tweak, repeat. The AI couldn't touch the simulator.
SPICEBridge is an MCP server with 18 tools covering the full design loop — template loading with auto-calculated component values (E24 series), AC/transient/DC simulation, automated measurement, spec verification, and schematic generation. One call goes from "1kHz low-pass filter" to a verified, simulated circuit. Works locally with Claude Code (stdio) or remotely via Cloudflare tunnel.
Ran it through a multi-model security audit before public release. Solo project, GPL-3.0. Would love feedback from anyone who works with SPICE.