Happy is a desktop app and harness for coding agents. You sign in with the Claude, Codex and Grok subscriptions you already pay for (Gemini through Antigravity), give each task the model that fits and delegate to subagents. Sessions can be shared, so a colleague can watch and steer the same agent.
The same sessions appear in the Happy iPhone and iPad app (iOS 15.1 or later), with traffic between devices end-to-end encrypted. If you prefer the terminal, the original `happy` CLI wraps Claude Code or Codex (`happy claude`, `happy codex`) and lets you continue from your phone.
Happy is free and MIT-licensed. Your projects stay as ordinary folders on your machine; prompts go to the model providers you sign in to.
How to Get It
Official downloads only. MLX never re-hosts an app, and never runs a command for you.
MLX Score
Ranked against the agents & automation listings, from real public data only. How the score works.
Pairs Well With
Claude CodeCoding
Codex CLICoding
PrizedAgentsInformation
- Developer
- Happy Engineering
- Category
- Agents & automation
- Price
- Free (Free and open source; it reuses your Claude, Codex and Grok subscriptions.)
- Your data
- On your Mac or in the cloud
- Licence
- MIT
- Mac
- Runs on a Mac (no minimum stated)
- iPhone and iPad
- iOS 15.1 or later
- Facts checked
- 2026-11-03
Sources
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Memory MCP ServerAgentsHappy is a product of Happy Engineering; MLX isn’t affiliated with it. Something wrong? Write to support@mlx.app.