OSCAR

Name: OSCAR
Author: trafalmejo

by trafalmejoversion 1.0.2i★ –iRuns on your computer

Registry nameio.github.trafalmejo/oscar

Install

Overview

Description from the maker (original English)

An assistant reads your OSCAR installation (OSC, MIDI, DMX) and drafts interfaces you review.

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).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx 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": {
    "oscar": {
      "command": "npx",
      "args": [
        "-y",
        "createwithoscar"
      ]
    }
  }
}

Run this in your terminal

claude mcp add oscar -- npx -y createwithoscar

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "oscar": {
      "command": "npx",
      "args": [
        "-y",
        "createwithoscar"
      ]
    }
  }
}

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": {
    "oscar": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "createwithoscar"
      ]
    }
  }
}

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.

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 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account trafalmejo, 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 18360 servers in this category
Published to the registry more recently than 59% of the other 18360 servers in this category
Basic checks equal to or better than 100% of the other 18360 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 OSCAR 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 (1.0.2) reached the registry 34 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

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

Alternatives

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Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

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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.

createwithoscar

Connects an AI assistant to OSCAR, the free, open-source editor and server for control interfaces: pages of buttons, sliders and other controls that phones and tablets open, and that send OSC, MIDI and DMX to show software, instruments and lights.

With it, an assistant such as Claude can:

Find out why something does not respond. It reads the OSCAR running on your computer: its projects, what is published, every widget's settings, the MIDI ports, and what OSCAR lately received and sent.
Draft an interface for you. It writes one, OSCAR's own validators check it, and it appears in OSCAR under File > Open project or template with a Draft badge, for you to open, check and publish yourself.

It never sends anything to your rig, publishes, or changes a project.

Connect

OSCAR 2.1 or later must be running on the same computer, with the MCP pill in its top bar green.

Claude Code

claude mcp add oscar -- npx -y createwithoscar

Claude Desktop: download OSCAR.mcpb from createwithoscar.site and double-click it. Nothing else to install.

Cursor, VS Code, Windsurf, Codex, Gemini CLI and other MCP apps: add a server with the command npx and the arguments -y createwithoscar. In most apps that is:

"mcpServers": { "oscar": { "command": "npx", "args": ["-y", "createwithoscar"] } } }

If it does not start on Windows, use the command cmd with the arguments /c npx -y createwithoscar.

Then ask, for example:

"Build me an OSCAR interface with four faders and a blackout button for my lighting desk."
"My OSCAR slider is not moving the light. Can you see why?"

How it works

This is a small program with no dependencies. The assistant starts it and speaks MCP to it; it passes each request to OSCAR on this computer and nowhere else. It finds OSCAR through a file OSCAR writes when it starts (~/.oscar/mcp.json), which holds OSCAR's local address and a token that changes at every start. Switching the MCP pill off in OSCAR closes the door.

If OSCAR is not running, the assistant still sees the tools, and is told to ask you to start OSCAR.

Needs Node 18 or later (the Claude Desktop bundle uses Claude's own).

Licence

BSD-3-Clause, as OSCAR is. Source: github.com/trafalmejo/OSCAR.

OSCAR

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

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

Tool Guardian

README from the maker

createwithoscar

Connect

How it works

Licence