RunKit + npm: cors-anywhere

// Heroku defines the environment variable PORT, and requires the binding address to be 0.0.0.0 var host = process.env.PORT ? '0.0.0.0' : '127.0.0.1'; var port = process.env.PORT || 8080; var cors_proxy = require('cors-anywhere'); cors_proxy.createServer({ originWhitelist: [], // Allow all origins requireHeader: ['origin', 'x-requested-with'], removeHeaders: ['cookie', 'cookie2'] }).listen(port, host, function() { console.log('Running CORS Anywhere on ' + host + ':' + port); });