SuperCollider

Name: SuperCollider
Author: Tok

by Tokversion 0.2.1i★ –iRuns on your computer

Registry nameio.github.Tok/supercollider-mcp

Install

Overview

Description from the maker (original English)

Make sound with SuperCollider: synths, drums, chords, melodies and soundscapes over OSC.

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: SC_HOST, SC_PORT

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": {
    "supercollider": {
      "command": "uvx",
      "args": [
        "supercollider-mcp"
      ],
      "env": {
        "SC_HOST": "your-value",
        "SC_PORT": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add supercollider --env SC_HOST=your-value --env SC_PORT=your-value -- uvx supercollider-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": {
    "supercollider": {
      "command": "uvx",
      "args": [
        "supercollider-mcp"
      ],
      "env": {
        "SC_HOST": "your-value",
        "SC_PORT": "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": {
    "supercollider": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "supercollider-mcp"
      ],
      "env": {
        "SC_HOST": "your-value",
        "SC_PORT": "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

SC_HOST env
Host of the SuperCollider server (scsynth)
SC_PORT env
UDP port of the SuperCollider server (scsynth)

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 Tok, 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 32696 servers in this category
Published to the registry more recently than 100% of the other 32696 servers in this category
Basic checks equal to or better than 100% of the other 32696 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 SuperCollider 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 (0.2.1) reached the registry today.

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, LexPact UK Contracts

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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.

SuperCollider MCP 🎛️

A Model Context Protocol server that lets AI assistants make sound with SuperCollider. Ask for "a dark ambient drone with slow swells" or "a breakbeat at 170 under a Cm7-Fm7 arpeggio" and it plays on your SuperCollider server.

Real synths and drums. It ships its own SynthDefs (sine, saw, square, noise, FM, pad, Karplus-Strong pluck, kick, snare, hats, grains) plus an effect chain (distortion, low-pass, delay, reverb) and a safety limiter. Nothing depends on sclang's default synth or on sc3-plugins.
Sample-accurate timing. Phrases are streamed to scsynth as timestamped OSC bundles, so every tool returns immediately. Calls can overlap, so you can layer drums, chords and melody.
Music-aware tools. Melodies follow 14 scales, chords understand symbols like Am7, Bbmaj9 and G/B, drum patterns are readable step strings the assistant can write itself, and generative tools take a seed so a result you like can be replayed exactly.
A panic button. stop_all silences everything this server started.

Requirements

SuperCollider 3.10 or newer (tested with 3.13). Only the audio server, scsynth, has to be running.
uv, or any Python 3.10+ with pip.

Quick start

1. Install and boot SuperCollider. Install it from the downloads page (or brew install --cask supercollider on macOS, sudo apt install supercollider on Debian/Ubuntu), then boot the server:

in the SuperCollider IDE: *Server → Boot Server* (or run s.boot;)
or without the IDE: scsynth -u 57110

2. Add the MCP server to your assistant.

Claude Code:

claude mcp add supercollider -- uvx supercollider-mcp

Claude Desktop, Cursor, Cline, Roo Code and other clients that use an mcpServers config:

"mcpServers": { "supercollider": { "command": "uvx", "args": ["supercollider-mcp"] } } }

To run the latest code from GitHub instead of the PyPI release, use "args": ["--from", "git+https://github.com/Tok/SuperColliderMCP", "supercollider-mcp"].

3. Ask for something. Start with "play a test sound" to check the connection, then try the prompts below.

Configuration

Setting	Flag	Environment	Default
scsynth host	`--host`	`SC_HOST`	`127.0.0.1`
scsynth UDP port	`--port`	`SC_PORT`	`57110`
log level (stderr)	`--log-level`		`WARNING`

For example "args": ["supercollider-mcp", "--port", "57111"].

Tools

Tool	What it does
`server_status`	Connection check: scsynth version, CPU, running playbacks, recent server errors
`stop_all`	Silence everything this server started and cancel scheduled notes
`play_example_osc`	A short test chime
`play_synth`	One note on `sine`, `saw`, `square`, `noise`, `fm`, `pad` or `pluck`
`create_layered_synth`	A thick unison: several detuned copies of one note spread in stereo
`create_lfo_modulation`	A held note with a server-side LFO on pitch, volume, filter or pan
`create_granular_texture`	A cloud of 5–100 tiny grains per second, scattered in pitch and space
`play_melody`	A generated melody in one of 14 scales that resolves to the tonic
`create_sequence`	A melody you spell out: `"C4 E4_ G4_ . C5+"`
`create_chord_progression`	Chord symbols as pads, staccato stabs, 8th-note arpeggios or power chords
`create_drum_pattern`	`four_on_floor`, `breakbeat`, `shuffle`, `half_time`, `two_step`, `random`, or your own
`create_generative_rhythm`	Drums that keep mutating: `minimal`, `techno`, `glitch`, `jazz`, `ambient`
`create_ambient_soundscape`	A drone with overlapping swells in a `calm`, `dark`, `bright`, `mysterious` or `chaotic` mood

Most tools also take volume (0–1) and an optional effects object:

{"reverb": 0.6, "delay": 0.3, "delay_time": 0.25, "distortion": 0.0, "filter": 0.2}

All amounts are 0–1, and 0 means off. filter darkens the sound with a low-pass filter. delay_time is in seconds and defaults to three quarters of a beat.

Notes are names like C4 (middle C), F#3 or Bb2, or frequencies like "440" or "440hz".

Sequences separate notes with spaces or dashes. _ halves a note, + doubles it, :1.5 sets its length in beats, and . is a rest.

Drum patterns use one character per 16th note: X accent, x hit, o ghost note, . rest. Lanes (kick, snare, hat, open_hat, perc) can have different lengths and loop independently:

{"custom": {"kick": "X..x..X...x.....", "snare": "....X.......X..o", "hat": "x.x.x.x.x.x.x.x."}, "tempo": 92, "swing": 0.2}

Things to try

"Play a dorian melody in D on the pluck synth with some delay, then the same one an octave lower."
"Give me two bars of breakbeat at 170 BPM, then layer an Am7-Dm7-G7-Cmaj7 arpeggio on top."
"A mysterious ambient soundscape, 60 seconds, low register."
"Sweep a saw's filter with a slow triangle LFO while a granular cloud shimmers around A5."
"Write me a half-time drum pattern with ghost notes on the snare."

How it works

assistant ──MCP (stdio)──▶ supercollider-mcp ──OSC/UDP──▶ scsynth ──▶ speakers

On first use the server checks that scsynth answers, uploads its SynthDefs (/d_recv) and creates its own node group with a voice group, an effects group and a limiter. Node IDs sit far above the ranges sclang uses, so your own SuperCollider work is not affected. If scsynth restarts, the setup runs again on the next call.

Each tool call turns into a *phrase*: a time-ordered stream of synth events (supercollidermcp/compose.py, pure Python). A background task sends each event about half a second ahead as an OSC bundle with an NTP timetag, and scsynth starts it at exactly that time. Every synth frees itself when its envelope ends. When a call asks for effects, its voices go to a private bus that one mcp_fx synth reads.

Upgrading from 0.1

Point your MCP config at uvx supercollider-mcp as shown above. Old configs that run mcp run path/to/server.py still work through a small compatibility server.py.
Sounds now come from real SynthDefs, so you no longer need sclang's default synth.
Tools return right away instead of blocking until the sound ends.
Some parameters changed meaning. create_drum_pattern takes bars (16 steps each) instead of beats. effects is an object instead of a JSON string. detune is now ±50 cents at 1.0 instead of up to an octave. The sc-osc command-line tool is gone.

See CHANGELOG.md for everything else.

Troubleshooting

"No reply from the SuperCollider server…": scsynth is not running, or it listens on a different port. Boot it, or set SC_PORT.
Calls succeed but you hear nothing: check that scsynth's outputs are connected to your sound card and that server_status shows synths while something plays.
Linux with PipeWire (the default on current Ubuntu and Fedora): scsynth talks to JACK, so install PipeWire's JACK layer (sudo apt install pipewire-jack) and start SuperCollider through it: pw-jack scide, or pw-jack scsynth -u 57110 without the IDE. Otherwise scsynth tries to start its own jackd, which conflicts with PipeWire.
`FAILURE IN SERVER /g_queryTree Group 2147480000 not found` in the post window on first connect is expected: it is how the server notices that scsynth still needs to be set up.
Remote scsynth: timetags use wall-clock time, so keep both machines' clocks in sync (NTP).

Development

git clone https://github.com/Tok/SuperColliderMCP.git

cd SuperColliderMCP uv sync uv run pytest # unit and protocol tests run anywhere uv run ruff check . && uv run ruff format --check .

Some tests need SuperCollider:

tests/test_synthdefs_nrt.py renders every SynthDef with scsynth -N (no audio device needed) and checks the audio. It runs automatically when scsynth is on PATH, or set SCSYNTH=/path/to/scsynth.
tests/test_live_server.py runs every tool against a live server. Start a silent one with scsynth -u 57199 -i 0 -o 0, then run SC_TEST_PORT=57199 uv run pytest.

The SynthDefs are written in SuperCollider itself, in supercollidermcp/synthdefs/synthdefs.scd. After editing that file, rebuild the compiled .scsyndef files with python scripts/build_synthdefs.py (needs sclang; it runs headless).

supercollidermcp/

├── server.py MCP tools: validation and wiring ├── compose.py musical logic: requests → timed events (pure, unit-tested) ├── theory.py notes, scales, chords ├── patterns.py drum patterns as step strings ├── engine.py server setup, buses, streaming playback, stop_all ├── osc.py async OSC client that also reads scsynth's replies └── synthdefs/ synthdefs.scd (source) + compiled .scsyndef files

Contributions are welcome. New sounds usually mean a SynthDef in synthdefs.scd plus a composer function in compose.py.

License

MIT. See LICENSE.

SuperCollider

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

LexPact UK Contracts

README from the maker

SuperCollider MCP 🎛️

Requirements

Quick start

Configuration

Tools

Things to try

How it works

Upgrading from 0.1

Troubleshooting

Development

License