Skip to main content

Claude Code On the Go

Use Claude Code or Codex from anywhere with mobile and web clients, realtime voice, and end-to-end encryption. Never miss what your AI is building.

Get StartedExplore CLI Reference

Quick start

Get up and running with Happy in minutes

1

Download the mobile app

Install Happy on your iOS or Android device to control your AI agents remotely.
2

Install the CLI

Install the Happy CLI on your computer to wrap Claude Code and Codex commands.
npm install -g happy-coder
3

Authenticate with QR code

Run the happy command and scan the QR code with your mobile app to link your devices.
happy
Your authentication uses end-to-end encryption. The QR code contains a one-time challenge that establishes a secure connection between your devices.
4

Start coding with AI

Use happy instead of claude to start sessions with mobile control enabled.
# Instead of: claude
happy

# Instead of: codex
happy codex

# Resume previous sessions
happy --resume
Now you can monitor and control your AI coding sessions from your phone, receive push notifications when input is needed, and switch control between devices instantly.

Why Happy?

Built for developers who code on the go

Mobile access

Check what your AI is building while away from your desk with native iOS, Android, and web clients.

Push notifications

Get alerted when Claude Code or Codex needs permission or encounters errors.

Device switching

Take control from phone or desktop with one keypress. Seamless transitions between devices.

End-to-end encryption

Your code never leaves your devices unencrypted. Built with TweetNaCl for cryptographic security.

Voice control

Talk to your AI agents in real-time with voice communication powered by LiveKit.

Open source

Audit the code yourself. No telemetry, no tracking. MIT licensed.

Explore by topic

Deep dive into Happy’s capabilities

Authentication

Learn how QR code authentication works and manage your credentials securely.

Daemon management

Control the background service that enables remote session spawning.

Session management

Create, resume, and control AI coding sessions across devices.

Sandbox configuration

Configure OS-level sandboxing for additional security.

Components

Understand Happy’s architecture

Happy CLI

Command-line interface that wraps Claude Code and Codex with mobile control capabilities.

Learn more

Mobile & Web App

React Native app for iOS and Android, plus web interface built with Expo.

Learn more

Happy Server

Backend server built with Fastify and PostgreSQL for encrypted synchronization.

Learn more

Happy Agent

CLI client for remote agent control with session creation and monitoring.

Learn more

Ready to get started?

Install Happy and start controlling your AI coding sessions from anywhere in minutes.

Get Started Now