Spicebridge
MCP server that gives AI assistants direct access to ngspice circuit simulation — design, simulate, and verify circuits through natural language
What is Spicebridge?
Spicebridge is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to mcp server that gives ai assistants direct access to ngspice circuit simulation — design, simulate, and verify circuits through natural language
MCP server that gives AI assistants direct access to ngspice circuit simulation — design, simulate, and verify circuits through natural language
This server falls under the Developer Tools category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- MCP server that gives AI assistants direct access to ngspice
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx spicebridgeConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use Spicebridge
Spicebridge is a Python-based MCP server that gives AI assistants direct access to ngspice, the open-source circuit simulator, enabling the full design-simulate-verify workflow for analog and digital circuits through natural language. It exposes 28 tools covering circuit creation from templates, component value calculation, SPICE netlist validation, AC/transient/DC analysis, Monte Carlo and worst-case simulations, bandwidth and gain measurement, schematic drawing, and KiCad export. Electrical engineers and students use it to design and verify circuits conversationally with Claude or other MCP clients without writing SPICE netlists by hand.
Prerequisites
- Python 3.10 or later installed
- ngspice installed and available on your system PATH (ngspice.sourceforge.io)
- pip package manager
- An MCP-compatible client such as Claude Desktop or Claude Code
- No external API keys required
Install ngspice
Install ngspice for your operating system. It must be accessible on your PATH for Spicebridge to invoke it.
# macOS (Homebrew):
brew install ngspice
# Ubuntu/Debian:
sudo apt install ngspice
# Windows: download installer from ngspice.sourceforge.ioInstall Spicebridge via pip
Install the spicebridge package from PyPI.
pip install spicebridgeAdd to your MCP client configuration
Add spicebridge to your MCP client config. The command is simply 'spicebridge' since it installs as a console script.
{
"mcpServers": {
"spicebridge": {
"command": "spicebridge"
}
}
}Restart your MCP client
Restart Claude Desktop or your MCP client to load the Spicebridge server.
Optionally set up cloud access via Cloudflare tunnel
To expose the server for remote or cloud-based AI clients, run the Spicebridge cloud setup command. This uses Cloudflare's OAuth flow to create a tunnel.
spicebridge setup-cloud # Permanent named tunnel
spicebridge setup-cloud --quick # Temporary quick tunnelSpicebridge Examples
Client configuration
Minimal configuration block for .mcp.json or claude_desktop_config.json using the installed spicebridge console script.
{
"mcpServers": {
"spicebridge": {
"command": "spicebridge"
}
}
}Prompts to try
Sample prompts covering circuit creation, simulation, measurement, and export using Spicebridge's 28 tools.
- "Create a first-order RC low-pass filter with a 1 kHz cutoff frequency and run an AC analysis from 1 Hz to 1 MHz"
- "Load the rc_lowpass_1st template, calculate component values for a 3 dB frequency of 500 Hz"
- "Run a transient simulation on my current circuit and plot the output voltage over 10 milliseconds"
- "Measure the bandwidth and gain of this amplifier circuit"
- "Run a Monte Carlo analysis with 100 samples using 5% resistor tolerance"
- "Export my filter design as a KiCad schematic file"
- "Validate this SPICE netlist and tell me if there are any errors"Troubleshooting Spicebridge
Spicebridge fails with 'ngspice not found' or FileNotFoundError
Ensure ngspice is installed and on your system PATH. Run 'ngspice --version' in your terminal to verify. If installed via Homebrew on macOS, the binary is typically at /opt/homebrew/bin/ngspice — add this directory to your PATH.
pip install spicebridge fails with Python version error
Spicebridge requires Python 3.10 or later. Check your version with 'python --version'. On systems with multiple Python versions, use 'pip3.10 install spicebridge' or create a virtual environment with 'python3.10 -m venv venv' first.
Simulation runs but returns empty or unexpected results
Validate your circuit's SPICE netlist using the validate_netlist tool before running simulations. Ensure all node names are consistent and that the circuit has a ground node (node 0). Check that component values are within realistic ranges for the simulation type.
Frequently Asked Questions about Spicebridge
What is Spicebridge?
Spicebridge is a Model Context Protocol (MCP) server that mcp server that gives ai assistants direct access to ngspice circuit simulation — design, simulate, and verify circuits through natural language It connects AI assistants to external tools and data sources through a standardized interface.
How do I install Spicebridge?
Follow the installation instructions on the Spicebridge GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.
Which AI clients work with Spicebridge?
Spicebridge works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is Spicebridge free to use?
Yes, Spicebridge is open source and available under the GPL-3.0 license. You can use it freely in both personal and commercial projects.
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Set Up Spicebridge in Your Editor
Choose your AI client for step-by-step setup instructions.
Quick Config Preview
Add this to your claude_desktop_config.json or .cursor/mcp.json
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