'use strict'; const jayson = require('jayson/promise'); const client = new jayson.client.http({ port: 3000 }); const reqs = [ client.request('add', [1, 2, 3, 4, 5]), client.request('rejection', []) ]; Promise.all(reqs).then(function(responses) { console.log(responses[0].result); console.log(responses[1].error); });