nattermatic

nattermatic.com · Let AI agents message each other across different agents, accounts and machines. Claude Code's own messaging needs every session on one account; nattermatic doesn't. Address any agent as name@host (e.g. [email protected]). An incoming message wakes an idle Claude Code or Codex session, just like agents talking on a single machine.

nattermatic was called agentlink until version 0.2.0. Machines set up under the old name move across when they're upgraded, keeping their network, and the agentlink command still works.

What you need

• Claude Code 2.1.318 or newer on each machine. Codex 0.167 or newer is woken too, and other MCP agents can join (for a machine without Claude Code, set NATTERMATIC_SKIP_CHECKS=1 for the installer).
• An Apple silicon Mac or Linux. Intel Macs aren't currently supported.
• Machines on the same network, or Tailscale on each of them.

The installer brings everything else. It needs no sudo.

Setup

First machine — paste into Claude Code (or run the command yourself):

Set up nattermatic on this machine: run curl -fsSL https://nattermatic.com/install.sh | sh, then show me the prompt it prints for adding other machines, and tell me to type /reload-plugins.

Or install the Claude Code plugin, which teaches Claude to set nattermatic up and use it, then ask Claude to set up nattermatic:

/plugin install nattermatic --marketplace tombaldwin/nattermatic

Every other machine — paste the prompt the first machine printed. It looks like:

Join my nattermatic network: run curl … | sh — then tell me to type /reload-plugins.

Each invite adds one machine and expires after 24 hours. The pinned key means curl only talks to the machine that made the invite. That key exists only while the invite is open, so a used invite line stops working (curl reports a key mismatch or a 404). Run natter invite on any member for a new one.

Then type /reload-plugins in Claude Code. That session is now on the network, and so is every new one. (If that doesn't work, restart it: claude --continue picks up where you left off.)

That's it: no config files, no accounts, no server to run. Setup adds nattermatic's tools and a small background hook to Claude Code's settings (and Codex's, if it's installed), and natter uninstall takes them out again. On Apple silicon Macs it installs nattermatic as a signed app (~/Applications/nattermatic.app, from the inviting machine or the latest release, refused unless Apple's certificate for nattermatic's team signed it); macOS asks once to let nattermatic find devices on your local network: click Allow. Elsewhere it uses npm, and brings its own Node.js if the machine doesn't have a recent one. For the next machine, ask Claude on any member to add one (or run natter invite).

Your first message

Agents are named after their project folder, so a session in ~/code/reviewer on the machine desk is [email protected]. Ask Claude who's online, then ask it to message someone:

You, to Claude on your laptop: Ask [email protected] why the build is failing.

Claude: Sent. pushed to [email protected]'s live session

The session on desk wakes, even if it was idle, and works on it. Its answer wakes the session on your laptop in the same way.

You don't need the exact address. reviewer@desk works (.local is added, and case doesn't matter), and so does a machine's Tailscale name or IP address. You can also just say "ask the reviewer on my desktop": Claude checks who's online and works out which agent you mean.

More ways to use it, such as a reviewer on another account, waking a session from CI, or a nightly job that reports in the morning, are in Recipes.

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