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OpenClaw runs on your own machine, so a quick prerequisites check saves you trouble later. Three things matter: Node, your OS, and an LLM API key.

OpenClaw is a CLI built on Node.js, so Node must be installed first. It is the runtime that actually executes OpenClaw on your computer.

The recommended version is Node 24. Node 22 LTS also works, but only at 22.19 or newer, which is the minimum OpenClaw supports.

Run this in your terminal to see what you have. The node --version command prints the installed version so you can compare it.

OpenClaw works on any major OS: macOS 15 or newer, Windows 10 20H2+ or 11, and Linux. You are not locked into one platform.

OpenClaw does not ship its own model, so you need an API key from your chosen LLM provider. That key is what powers the assistant's thinking.

Because OpenClaw is local-first, the provider choice is yours. You connect your own key, so you stay in control of cost and which model runs.

Treat your API key like a password. A secret key grants access to a paid account, so never paste it into chats or commit it to a public repo. 🔑

Everything runs on your hardware, so make sure the machine you choose will stay on when you want the assistant available. No cloud server is involved.

Since OpenClaw is a CLI, you install and run it from a terminal. Any standard shell works, on macOS, Windows, or Linux alike.

You are ready when three boxes are ticked: a checklist of Node 24 (or 22.19+), a supported OS, and an LLM API key in hand. Then install can begin.

Let us confirm the minimum Node requirement.

You now know the three prerequisites: Node 24 (or 22.19+), a supported OS, and your own LLM API key kept safe. With those ready, you can install OpenClaw. ✅