Quick script that uses bit.ly OAuth api access tokens

nodejs.biy.ly.shorten.js

var request = require("request");

var   BIT_LY_ACCESS_TOKEN 	= "YOUR_APP_ACCESS_TOKEN" /* See: https://bitly.com/a/oauth_apps# */
    , BIT_LY_SHORTEN_URL 	= "https://api-ssl.bitly.com/v3/shorten";

var   shareUrl = "http://www.google.com/";

var options = { "qs": { "access_token": BIT_LY_ACCESS_TOKEN, "longUrl": shareUrl }, "json": true };

request.get( BIT_LY_SHORTEN_URL, options,
	function( error, head, body ) 
		{
			if(!error && body.data.url )
				shareUrl = body.data.url;

			console.log(shareUrl);
		}
);

Uses request module (https://github.com/mikeal/request), although i probably doesn't need to but request is so easy to use :)