$ npm install gouv-openfisca-api

$ npm install git://github.com/Raesta/gouv-openfisca-api.git

var OpenfiscaAPI = require('gouv-national-address-api');

var Openfisca = new OpenfiscaAPI();

OpenFisca.entities(null, function(error, result) {
  console.log(error, result);
});

OpenFisca.calculate({/* Your data */}, function(error, result) {
  console.log(error, result);
});