Here is an example to create incident using Request module in NodeJS

var request = require('request');

var options = {

      url: 'https://[MY INSTANCE].service-now.com/api/now/table/incident',

      method: 'POST',

      headers: {"Accept":"application/json","Content-Type":"application/json","Authorization": ("Basic " + new Buffer("[USERNAME]:[PASSWORD]").toString('base64'))},

      json: true,

      body: {'short_description':'Creating incident through Request','assignment_group':'287ebd7da9fe198100f92cc8d1d2154e','urgency':'3','impact':'3'}

};

function callback(error, response, body) {

  if (error) {

      console.log(error);

  } else{

          console.log(body);

  }

}

request(options,callback);