$ npm install monkeylearn-classifier --save

var Classifier = require('monkeylearn-classifier').Classifier;

var classifier = new Classifier(process.env['MONKEYLEARN_AUTH_TOKEN'], 
                                {
                                  classifierId: 'cl_5icAVzKR' // Generic Topic Classifier
                                });

classifier.classify([
    "Hello World",
    "Foxes, Horses, Bunnies and Ducklings"
  ], 
  function(error, response) {
    if(error){
      console.error("HTTPS ERROR", error);
    } else {
      if(response.resolved()){
        console.log(JSON.stringify(response.results()));
      } else {
        // API Error Message
        console.log("API ERROR", response.error());
      }
    }
  });                                

$ export MONKEYLEARN_AUTH_TOKEN=YOUR_AUTH_TOKEN
$ ./bin/classify "Hello World"