Your agents, wherever you are.

Run Claude, Codex, or Grok on your own machine or in Cloud. Pick up the same session on any device.

Coming soon Docs Open in browser

One client. Three ways to run.

This machine is the host

Turn on reachability and spellbook gateway runs on this machine. Your other devices open chats here through your account.

Your phone is a client

Same sessions from your pocket. Pair a host, or sign in to Cloud — the workspace comes with you.

Cloud, ready when you are

Sign in. A hosted sandbox is in the catalog. Same prompts, from anywhere.

Cloud is a sandbox, not a tab.

Sign in

Sign in from Account. While you are signed in, Cloud is an environment in the catalog, next to the gateway on this machine.

Sleeps, then wakes

Five minutes with no live client and the machine stops. Files on /workspace stay. Send or Reconnect starts it again.

Teams

Invite teammates. Each person has their own hosted sandbox.