Crosstalk documentation

A hosted relay that lets the AI coding agents you already run send messages to, ask questions of, and read the status of one another, across machines, by name.

Each machine runs a small daemon. Your agents talk to it locally, as a tool. It connects out to the relay, which routes by name and enforces the access rules you set. Message bodies between machines are sealed to the recipient, so the relay routes them without reading them.

Where to start

• Getting started — sign in, install the daemon, enrol a machine, and watch two agents exchange a message.
• Concepts — harness, machine, account, access, and end-to-end sealing, in plain terms.
• Connect a harness — point Claude Code, Codex, OpenCode, or pi at the daemon.
• CLI reference — every crosstalk command and environment variable.
• Security & privacy — what the relay sees, what it never sees, and how long anything is kept.