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Microcap MCP Server

by monoxide-xen Your server? Claim it
local only

Microcap MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 77 installs a week from pypi. Last commit 27 Jul 2026.

Simulate, generate and draw analog circuits in Micro-Cap 12: SPICE analyses, sweeps and schematics

Installs per day peak 20 · avg 11 · -16% w/w
a month agotoday
77
Installs / week
pypi · microcap-mcp
2
Stars
0 open issues
27 Jul 2026
Last commit
0 releases in 90 days
MIT
License
Python

What the code does

We read the source, 20 h ago · rules 3dff92dd89df

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

        proc = subprocess.Popen(

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Three servers free · no card

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

run in your terminal
claude mcp add microcap-mcp -- uvx microcap-mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "microcap-mcp": {
      "args": [
        "microcap-mcp"
      ],
      "command": "uvx"
    }
  }
}
~/.codex/config.toml
[mcp_servers.microcap-mcp]
command = "uvx"
args = ["microcap-mcp"]
.cursor/mcp.json
{
  "mcpServers": {
    "microcap-mcp": {
      "args": [
        "microcap-mcp"
      ],
      "command": "uvx"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "microcap-mcp": {
      "args": [
        "microcap-mcp"
      ],
      "command": "uvx"
    }
  }
}

This one needs environment variables set before it will start: MICROCAP_HOME (Folder holding mc12_64.exe, if Micro-Cap 12 is installed somewhere the automatic scan does not find). The author declared them in the registry entry; get the values from the project itself.

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Microcap MCP — questions

Answers built from our own checks of this server.

Why is there no uptime for Microcap MCP?
Microcap MCP runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the pypi package microcap-mcp was installed 77 times last week.
How do I connect Microcap MCP?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It runs locally, so the command pulls microcap-mcp straight from pypi; nothing to host, nothing to sign up for.
How many people use Microcap MCP?
The pypi package microcap-mcp was installed 77 times in the last week. Week over week that is -16%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.
Is Microcap MCP open source?
Yes — it is published under the MIT licence, written in Python and 2 stars on GitHub. The source link is on this page, so you can read exactly what it does with your data before you connect it.