Send requests to the Bitstamp API in much the same way you use Mikeal's 'request' module. The key, signature, and nonce parameters are automatically added to every http POST request.
npm install bitstamp-request
Initialize with the values associated with your account
var Bitstamp = require('bitstamp-request');
var b = new Bitstamp(bitstamp_customer_id, bitstamp_api_key, bitstamp_api_secret);
Now just make http POST requests
b.post('https://www.bitstamp.net/api/buy/', {amount: 100, price:201.50}, function(err, response){
console.log(response.body);
})
Public api requests also supported
b.get('https://www.bitstamp.net/api/ticker/', function(err, response){
console.log(response);
})