Example of pushing data to a Geckoboard widget. Based on this documentation: http://docs.geckoboard.com/custom-widgets/push.html Specific to the "numbers" widget. Find more widget specs here: http://docs.geckoboard.com/custom-widgets/index.html#types

app.js

var config = require("./config")
  , request = require("request")
  , i = 0;

function ping(){
  request.post({
    url: config.push_url,
    json: {
      api_key: config.api_key,
      data:{
        item: [{
          // value, which is...
          text: "",
          value: i
        },{
          // ...relative to this value
          text:"",
          value: 100
        }] 
      }
    }
  }, function(e, r, b){
    if(e) throw e;
    console.log(b);
    i++;
  });
}

// push data every second
setInterval(ping, 1000);

config.json

{
  "push_url": "https://push.geckoboard.com/v1/send/...",
  "widget_key": "...",
  "api_key": "..."
}