Multisim MCP — Claude Code MCP server: circuits and simulation
Lets an AI agent drive Multisim: build a circuit from a spec, run DC/AC/TRAN, and get a report with waveforms.
claude mcp add --env MULTISIM_MCP_TEMPLATE_DIR=<MULTISIM_MCP_TEMPLATE_DIR> --transport stdio multisim-mcp -- uvx multisim-mcpWhat Multisim MCP does
The server takes a circuit description plus a constrained SPICE netlist from the agent. It validates the commands, writes an editable .ms14 file, opens it in Multisim, enumerates the parts back for a cross-check, and saves a PNG of the schematic. Simulation output comes back as raw data, CSV, SVG plots and a command log.
Tools cover a single run, batch experiments with pass/fail checks on gain, bandwidth, ripple or THD, and sweeps across parameters, tolerances, temperature or Monte Carlo. Long runs become background jobs with a job_id you can list, cancel or retry. All COM work sits in a separate 32-bit process, so a crashed worker restarts without taking the server down.
You need a licensed Multisim 14+ on the same machine and the MULTISIM_MCP_TEMPLATE_DIR variable pointing at a local template pack; the pack is built with tools/bootstrap_local_component_pack.py from your own Multisim install. The stable package is v1.2.0, and some analog workflow features live only in the pre-release branch.
What it helps with
- turn a SPICE netlist into an editable Multisim schematic
- run operating point, DC, AC or transient sweeps hands-free
- check gain, bandwidth and ripple against stated requirements
- try different resistor and capacitor values in one sweep
- export schematic, CSV and a report together
Example prompts for the agent
- Build this voltage divider from the netlist, run a DC sweep and show me the plot
- Verify that gain is 0.5 within 1 percent and write the report to
C:\experiments\divider-verified - Sweep the capacitor values and rank the runs by ripple
How to install Multisim MCP
Platform CLI
claude mcp add --env MULTISIM_MCP_TEMPLATE_DIR=<MULTISIM_MCP_TEMPLATE_DIR> --transport stdio multisim-mcp -- uvx multisim-mcpReplace <…> with your own values. uvx runs the command named after the package; if the README names another one, use uvx --from multisim-mcp <command>
Platform CLI
codex mcp add multisim-mcp --env MULTISIM_MCP_TEMPLATE_DIR=<MULTISIM_MCP_TEMPLATE_DIR> -- uvx multisim-mcpReplace <…> with your own values. uvx runs the command named after the package; if the README names another one, use uvx --from multisim-mcp <command>
Config file
{
"mcpServers": {
"multisim-mcp": {
"command": "uvx",
"args": [
"multisim-mcp"
],
"env": {
"MULTISIM_MCP_TEMPLATE_DIR": "<MULTISIM_MCP_TEMPLATE_DIR>"
}
}
}
}Replace <…> with your own values. uvx runs the command named after the package; if the README names another one, use uvx --from multisim-mcp <command>
Config file
{
"servers": {
"multisim-mcp": {
"type": "stdio",
"command": "uvx",
"args": [
"multisim-mcp"
],
"env": {
"MULTISIM_MCP_TEMPLATE_DIR": "<MULTISIM_MCP_TEMPLATE_DIR>"
}
}
}
}Replace <…> with your own values. uvx runs the command named after the package; if the README names another one, use uvx --from multisim-mcp <command>
Platform CLI
gemini mcp add -e MULTISIM_MCP_TEMPLATE_DIR=<MULTISIM_MCP_TEMPLATE_DIR> multisim-mcp uvx multisim-mcpReplace <…> with your own values. uvx runs the command named after the package; if the README names another one, use uvx --from multisim-mcp <command>
Step by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more
Questions about Multisim MCP
How to install Multisim MCP in Claude Code?
Run claude mcp add multisim-mcp -- uvx multisim-mcp. To point at your own template folder, use claude mcp add --env MULTISIM_MCP_TEMPLATE_DIR=<MULTISIM_MCP_TEMPLATE_DIR> --transport stdio multisim-mcp -- uvx multisim-mcp.
What does Multisim MCP do?
It builds a Multisim schematic from the agent's requirements, runs the simulation, computes the requested metrics, and returns the drawing, data and report to the chat.
What do I need to run it?
A licensed Multisim 14+ installation and a local template pack set via MULTISIM_MCP_TEMPLATE_DIR. The pack is generated from your own Multisim copy by a bundled script.
