Newton Browser MCP Server

What the code does

We read the source, 20 h ago · rules 3dff92dd89df

A value the model can set ends up inside a file or shell call. That is not a flaw by itself — for a terminal server it is the job — but it is where things go wrong when it is not.

  fs.writeFileSync(output, buffer, { flag: "wx", mode: 0o600 });

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

    result = spawnSync(process.execPath, [

  const profileRoot = path.join(userDataRoot, profileDirectory);

Found in continuous integration, deployment or infrastructure files, or in a neighbouring package of the same monorepo. None of this is installed when you add the server: it describes how the project is built and released. We list it because a leaked key in a build pipeline is still a real problem, but it is not something this server does on your machine.

      - name: Select release tag
        env:
          INPUT_RELEASE_TAG: ${{ inputs.tag }}

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

claude mcp add newton-browser -- npx -y newton-browser

{
  "mcpServers": {
    "newton-browser": {
      "args": [
        "-y",
        "newton-browser"
      ],
      "command": "npx"
    }
  }
}

[mcp_servers.newton-browser]
command = "npx"
args = ["-y", "newton-browser"]

{
  "mcpServers": {
    "newton-browser": {
      "args": [
        "-y",
        "newton-browser"
      ],
      "command": "npx"
    }
  }
}

{
  "mcpServers": {
    "newton-browser": {
      "args": [
        "-y",
        "newton-browser"
      ],
      "command": "npx"
    }
  }
}