Spellbook

Your agents, wherever you are.

Pair the machine that already runs Claude, Codex, or Grok. Open the same sessions from your phone. Or sign in with AuthKit and use Cloud — no machine left on.

Open in browser Download

One client. Three ways to run.

This machine is the host

Manage gateway starts spellbook gateway on this machine. Phones and browsers pair over the same socket.

Your phone is a client

The phone never spawns an agent. It talks ACP to whatever is already running — a host or Cloud.

Cloud when nothing is awake

Sign in with AuthKit. A hosted sandbox is in the catalog. Same prompts — no lid left open.

Cloud is a sandbox, not a tab.

AuthKit sign-in

WorkOS AuthKit on 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.

Business

A shared wallet for hours, credit, and a spend cap. Invite teammates. Each person still has their own hosted sandbox.

Personal Cloud is 5 hours and $5 a month. Business is 20 hours and $25, shared. Enterprise brings its own compute and agents. We meter hosted usage; we are not charging yet. Pricing →

Install the CLI

That’s the binary Manage gateway needs, and spellbook gateway in a terminal.

curl -fsSL https://spellbook.nitemaeric.com/install.sh | sh
irm https://spellbook.nitemaeric.com/install.ps1 | iex

Desktop can install it for you from Settings. Desktop, phone, and CLI →