Reservations open now. Assembled OpenCollars, built by openpasture. Reserve now

Your fence,
on your machine.

v0.1.0. macOS 11 or later, Apple Silicon or Intel.

One binary. Your server.

Each download holds openpasture and collar-sim.

Download openpasture-server-linux-x64.tar.gz, or run this, then open localhost:7878.

curl -L https://github.com/open-pasture/openpasture/releases/latest/download/openpasture-server-linux-x64.tar.gz | tar xz
./openpasture serve

Off localhost, the app asks for its token: openpasture token, or docker exec <container> openpasture token.

Try it without collars.

Add a herd in the app, then run collar-sim from the server download.

Twelve collars on your first herd, a fix every five seconds.

./collar-sim --count 12

Open source, all of it. The app and server are AGPL-3.0. The collar protocol and geometry crates are Apache-2.0. The server and its database run on your machine.

Bring your own brain. Decisions come from your own Codex or Claude subscription, an API key, or a built-in heuristic.

Be one of the first herds.

Expected from $249, first batch in Q1 2027. $50 to reserve, fully refundable.

Are you an agent? Start with the MCP tools