How the host starts it

A local host needs to know which command starts the server.

{
  "mcpServers": {
    "clock": {
      "command": "node",
      "args": ["/absolute/path/to/build/index.js"]
    }
  }
}

The host launches that file as a new process. It connects the process's input and output streams to an MCP client.

The configuration creates the meeting point.