Setting Up a Proxy Server with Express

February 20, 2015

The Problem:

2015 02 20

I am working on a project that uses BreweryDB. While trying to load some data from the API, I encountered a problem: the API doesn't support JSONP. This leads to a CORS issue when I attempt to fetch data directly using Angular:

XMLHttpRequest cannot load []( No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:3000' is therefore not allowed access.

My Solution:

To avoid exposing my API key, I needed to set up an intermediate proxy. Below are the step-by-step instructions for setting up a proxy using Node.js and Express.

Step 1: Install Express and Request

npm install express --save
npm install request --save

Step 2: Create a server.js File

var express = require('express');
var request = require('request');
var app = express();

Step 3: Set Up the Route (replace API_KEY with your actual API key)

app.get('/api', function(req, res) {
  request('' + API_KEY, function (error, response, body) {
    if (!error && response.statusCode === 200) {

Step 4: Set Up the Port

console.log('Server running on port %d', 3000);

Step 5: Start the Server (node server.js)

Open your browser and navigate to http://localhost:3000/api. You should be able to see the JSON object and log it in your browser console:

"message": "Request Successful",
"data": "You have reached the API. For access, check out",
"status": "success"

If you encounter any problems, feel free to send me an email. ☺

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Victor Leung, who blog about business, technology and personal development. Happy to connect on LinkedIn