handup is an approval inbox for AI coding agents. When an agent wants to do something consequential, like run a database migration, push a release or send an email, it sends a request with the real thing attached: the command, the diff, the file or the email draft. You approve it, or deny it with feedback such as "use staging instead", from the terminal, the desktop app or the Android app. A denial reaches the agent as a normal answer, so it changes course instead of retrying.
`handup setup` connects the agents it finds, including Claude Code, Codex, Cursor and other MCP clients. Requests and decisions stay in a daemon on your own computer, with no handup account. handup is a review tool, not a sandbox. It runs on Linux, macOS and Windows (beta). The first 14 days are free with every feature, then it is $30 one-time per person.
I run lots of agent sessions at once and kept hunting for which one was asking me something. I wanted one inbox for every decision.