Keyboardia

Name: Keyboardia
Author: adewale

by adewaleversion 1.1.0i★ –iRuns in the cloud

Registry nameio.github.adewale/keyboardia

Install

Overview

Description from the maker (original English)

Create, co-edit, analyze, publish, and export collaborative step-sequencer sessions through MCP.

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 in the cloud
Transport: Streamable HTTP
Category: Other

Install

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

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

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

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://keyboardia.dev/mcp

Run this in your terminal

claude mcp add --transport http keyboardia https://keyboardia.dev/mcp

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "keyboardia": {
      "url": "https://keyboardia.dev/mcp"
    }
  }
}

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": {
    "keyboardia": {
      "type": "http",
      "url": "https://keyboardia.dev/mcp"
    }
  }
}

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.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://keyboardia.dev/mcp

Menu names can differ slightly by plan and over time.

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

We have not read this server’s tool list yet; we check endpoints in rotation.

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 adewale, 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 checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Otheri

More stars than 0% of the other 32709 servers in this category
Published to the registry more recently than 20% of the other 32709 servers in this category
Basic checks equal to or better than 100% of the other 32709 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 Keyboardia 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 in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.1.0) 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. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

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

Alternatives

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Runs in the cloud★ 211Updated 2 days ago

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SwarmMemo

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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.

Keyboardia

A multiplayer step sequencer with polyrhythmic patterns, built for real-time collaboration.

Features

Real-time Multiplayer - Up to 10 players can jam together on the same session
Polyrhythmic Patterns - Each track can have 3-128 step counts (26 options including triplet-friendly values)
70 Sound Generators - 32 Web Audio synths, 11 Tone.js FM/AM synths, 27 sampled instruments
27 Sampled Instruments - Grand piano, 808 kit, acoustic drums, Hammond organ, kalimba, steel drums, strings, guitars, sax, and more
Effects Chain - Reverb, delay, chorus, and distortion with limiter (full multiplayer sync)
Parameter Locks - Per-step pitch, volume, and tied notes automation
Chromatic Grid - Two view modes: "Events" (key intervals + used pitches) and "All" (49 pitches from -24 to +24)
Scale Lock - Constrain chromatic grid to selected musical scale with out-of-scale warnings
Scale Sidebar - Visualize scale notes with root/fifth emphasis and active usage highlighting
Per-track Swing - Global and per-track swing settings for groove control
Session Sharing - Share links, remix others' work, publish immutable sessions
QR Code Sharing - Mobile-friendly session sharing
Agent Rhythm Editing (Experimental) - Co-edit, create, remix, publish, export, and analyze sessions through stateless MCP

Use with an agent

Configure your MCP client with:

https://keyboardia.dev/mcp

To co-edit music you already have, open a session and give the agent the UUID from its https://keyboardia.dev/s/{session_id} URL. Agents can read the current rhythm, add a track, assign specific steps, and change tempo. Their edits use the same live session as connected browsers, and published sessions stay read-only.

Agents can also start from nothing: create a new session and hand back its link, remix a published session into an editable copy without touching the original, publish the current result as an immutable snapshot when you ask, and export the session as a MIDI file for a DAW.

They can explain music too — ask what key a session is in, how its rhythms sit against each other, or what chord a moment forms, and the answer comes from the same music-theory module the Key Assistant uses, with its uncertainty stated rather than hidden.

See the stateless MCP rhythm-slice specification for the exact tool contract and current limitations. Directory maintainers can use the canonical MCP listing record, and hosted data handling is described in the MCP privacy notice.

Tech Stack

Frontend: React 19, TypeScript, Vite
Audio: Web Audio API, Tone.js
Backend: Cloudflare Workers, Durable Objects, KV Storage
Real-time: WebSockets with Hibernation API

Getting Started

cd app

Install dependencies

npm install

Start development server

npm run dev

Run tests

npm run test:all

Build for production

npm run build

Development

Debug Mode

Add ?debug=1 to the URL to enable debug features:

Event tracing
Audio state debugging
Persistent log storage
Bug pattern detection

See docs/DEVELOPMENT-TOOLS.md for comprehensive debugging documentation.

Project Structure

app/

├── src/ │ ├── audio/ # Audio engine, synths, effects, scheduling │ ├── components/ # React UI components │ ├── hooks/ # React hooks (useSession, useMultiplayer, etc.) │ ├── state/ # State management (grid reducer) │ ├── sync/ # Multiplayer synchronization │ ├── worker/ # Cloudflare Worker (Durable Objects, API routes) │ ├── utils/ # Logging, debugging, utilities │ └── debug/ # Debug overlay and context ├── e2e/ # End-to-end tests (Playwright) ├── test/ # Integration tests └── scripts/ # Development and debugging scripts

Key Files

File	Description
`app/src/audio/engine.ts`	Main audio engine - coordinates all audio subsystems
`app/src/audio/scheduler.ts`	Drift-free lookahead scheduling (25ms timer, 100ms lookahead)
`app/src/audio/synth.ts`	16-voice polyphonic synthesizer with voice stealing
`app/src/audio/toneSynths.ts`	Tone.js synth manager (FM, AM, Membrane, etc.)
`app/src/audio/toneEffects.ts`	Effects chain (reverb, delay, chorus, distortion)
`app/src/sync/multiplayer.ts`	WebSocket client for real-time sync
`app/src/worker/live-session.ts`	Durable Object for session state

Testing

cd app

npm run test:unit # Unit tests (vitest, fast product lane) npm run test:audio-render # Offline audio renders (native Web Audio) npm run test:verification-tooling # Tests of the verification tooling itself npm run test:integration # Integration tests (Cloudflare Workers) npm run test:all # All of the above npm run analyze:bugs # Static bug pattern analysis

Architecture

Audio Signal Chain

Source (Oscillator/Sample)

→ Track Gain (per-track volume) → Master Gain → Effects Chain (Tone.js: reverb → delay → chorus → distortion) → Limiter → Compressor → Destination

Synth Engines

SynthEngine (synth.ts) - Native Web Audio oscillators, 40+ presets
ToneSynthManager (toneSynths.ts) - Tone.js FM/AM/Membrane synths
AdvancedSynthEngine (advancedSynth.ts) - Dual-oscillator with filter envelope and LFO
SampledInstrument (sampled-instrument.ts) - Sample-based playback (piano)

Multiplayer Architecture

Client A ←→ Durable Object ←→ Client B

↓ DO Storage (immediate) ↓ KV Storage (on disconnect)

Each session is a single Durable Object instance
WebSocket connections use Hibernation API for cost efficiency
State changes broadcast to all connected clients
Hybrid persistence: Mutations saved immediately to DO storage, KV updated on disconnect

Documentation

ROADMAP.md - Implementation phases and status
SYNTHESIS-ENGINE.md - Audio architecture spec
SHARING-AND-PUBLISHING.md - Session persistence spec
DEVELOPMENT-TOOLS.md - Debug tools reference
UI-PHILOSOPHY.md - Design principles
LESSONS-LEARNED.md - Debugging war stories

License

MIT

Bundled instrument samples are third-party content with their own licenses (CC0, public domain, and similar free-use terms), documented in app/public/instruments/LICENSE.md.

Keyboardia

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

SwarmMemo

README from the maker

Keyboardia

Features

Use with an agent

Tech Stack

Getting Started

Install dependencies

Start development server

Run tests

Build for production

Development

Debug Mode

Project Structure

Key Files

Testing

Architecture

Audio Signal Chain

Synth Engines

Multiplayer Architecture

Documentation

License