Microcap MCP

Name: Microcap MCP
Author: monoxide-xen

by monoxide-xenversion 0.1.1i★ –iRuns on your computer

Registry nameio.github.monoxide-xen/microcap-mcp

Install

Overview

Description from the maker (original English)

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

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Other

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: MICROCAP_HOME

You need

PyPIPython’s uv installed (for the uvx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "microcap": {
      "command": "uvx",
      "args": [
        "microcap-mcp"
      ],
      "env": {
        "MICROCAP_HOME": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add microcap --env MICROCAP_HOME=your-value -- uvx microcap-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "microcap": {
      "command": "uvx",
      "args": [
        "microcap-mcp"
      ],
      "env": {
        "MICROCAP_HOME": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "microcap": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "microcap-mcp"
      ],
      "env": {
        "MICROCAP_HOME": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

MICROCAP_HOME env
Folder holding mc12_64.exe, if Micro-Cap 12 is installed somewhere the automatic scan does not find

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account monoxide-xen, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 32725 servers in this category
Published to the registry more recently than 19% of the other 32725 servers in this category
Basic checks equal to or better than 100% of the other 32725 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Microcap MCP safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.1) reached the registry 3 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Signoff

Alternatives

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

microcap-mcp

ИИ-агент строит, считает и рисует аналоговые схемы в Micro-Cap 12.

Русский · English

Схему нарисовал сам сервер (1:1 с Micro-Cap, с рабочей точкой) · график посчитал Micro-Cap

Работает через штатный batch-режим Micro-Cap (MC12 @batch.bat) — headless, без GUI-автоматизации и без модификации программы.

Что делает

🔧 Строит схемы с нуля — 8 генераторов каскадов (общий эмиттер, повторитель, MOSFET, дифпара, токовое зеркало, каскод, ОУ, RLC) с авто-смещением. Каждый сверен с теорией: усиление, рабочая точка, резонанс.

📊 Считает — transient / AC / DC / искажения / устойчивость, рабочая точка, свипы. Комплексный вывод как {re, im}, диагностика солвера.

🎨 Рисует — сам рендерит .CIR в SVG 1:1 с Micro-Cap: родные символы из библиотеки MC, сетка, все повороты и отражения, раскладка подписей. Накладывает напряжения рабочей точки. /IC в batch-режиме MC этого не умеет — а сервер умеет.

Установка

Нужен Windows, Python 3.11+ и установленный Micro-Cap 12 (фримварь). Клонировать ничего не надо — укажи в MCP-клиенте, и uvx сам скачает пакет:

"mcpServers": { "microcap": { "command": "uvx", "args": ["microcap-mcp"], "env": { "MICROCAP_HOME": "E:/Tools/MC12" } // только если автопоиск не нашёл } } }

Драйвер сам ищет Micro-Cap в типовых местах; MICROCAP_HOME укажи на папку с mc12_64.exe, если он лежит нестандартно.

Из исходников

git clone https://github.com/monoxide-xen/microcap-mcp

cd microcap-mcp uv sync

"mcpServers": { "microcap": { "command": "uv", "args": ["--directory", "C:/path/to/microcap-mcp", "run", "microcap-mcp"] } } }

Инструменты

Инструмент	Что делает
`simulate` · `sweep` · `plot`	посчитать SPICE-нетлист, свип по `.DEFINE`, график в JPEG
`generate_transistor_amplifier` · `_emitter_follower` · `_mosfet_amplifier`	каскады на транзисторе / MOSFET, авто-смещение под середину питания
`generate_differential_pair` · `_current_mirror` · `_cascode` · `_amplifier`	дифпара, зеркало, каскод, усилитель на ОУ
`generate_schematic`	источник + R/C/L последовательно и параллельно (RC/RL/RLC, делители, контуры)
`simulate_schematic` · `plot_schematic`	посчитать / построить график произвольной `.CIR`
`draw_schematic` · `annotate_schematic`	нарисовать `.CIR` в SVG (1:1 с MC) · с рабочей точкой на схеме
`simulate_example` · `search_examples` · `get_example` · `describe_example` · `list_domains`	~490 эталонных схем из поставки MC: поиск, исходник, анализы

Плюс ресурсы microcap://guide и microcap://domains и промпт analyse_circuit — чтобы агент не дал MC молча соврать.

Тесты

uv run pytest        # 138 юнит без Micro-Cap; +30 интеграционных против физики (нужен MC)

Без Micro-Cap интеграционные пропускаются — CI остаётся зелёным.

Как это устроено

Особенности Micro-Cap — поведение, которого нет в мануале (а местами оно мануалу противоречит).
eval/harness.py — прогон всех ~490 схем поставки с раскладкой провалов по причинам (сейчас 88% отвечают).

Лицензия

MIT на код репозитория. Micro-Cap 12 принадлежит Spectrum Software — не включён, не перезалит, не модифицирован: используется его документированный CLI.

Microcap MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Signoff

README from the maker

microcap-mcp

Что делает

Установка

Инструменты

Тесты

Как это устроено

Лицензия