apisauce-get

// npm install apisauce --save 

var apisauce = require('apisauce');

const api = apisauce.create({
  baseURL: 'https://api.carbonintensity.org.uk'
});

api
  .get('/intensity')
  .then((response) => response.data)
  .then(console.log)

// output ->
// { data:
//   [ { from: '2017-12-19T13:30Z',
//       to: '2017-12-19T14:00Z',
//       intensity: [Object] } ] }