Due to a request, I added another function to #LivePrinter called lib.getdata(). It gets data from any HTTP server using GET or POST. It expects a JSON object with a "data" key that contains an array of [x,y,z] points. See below to use:

liveprinter code to get data from a remote server using POST:

const data = await lib.getdata("http://localhost:8888/data");

loginfo(JSON.stringify(data));

// loop through data
for (let p of data) {
    loginfo(`${p}`);

      let [x,y,z] = p;
    loginfo(`moveto ${x},${y}`);

      // move to coordinates from data

      # mov2 x:x y:y

}

What's returned from the server http://localhost:8888/data with a POST command:

{ data: [
      [0,0,0],
      [1,1,1],
      [2,2,2]
      ]
}