# Count the number of peers using the `scrape` feature of torrent trackers Here's a full example with `browserify`. ``` npm install browserify parse-torrent bittorrent-tracker ``` `scrape.js`: ```js var Tracker = require('bittorrent-tracker') var magnet = require('magnet-uri') // These values don't matter var peerId = new Buffer('01234567890123456789') var port = 6889 var magnetURI = "magnet:?xt=urn:btih:6a9759bffd5c0af65319979fb7832189f4f3c35d&dn=sintel.mp4&tr=udp%3A%2F%2Fexodus.desync.com%3A6969&tr=udp%3A%2F%2Ftracker.coppersurfer.tk%3A6969&tr=udp%3A%2F%2Ftracker.internetwarriors.net%3A1337&tr=udp%3A%2F%2Ftracker.leechers-paradise.org%3A6969&tr=udp%3A%2F%2Ftracker.openbittorrent.com%3A80&tr=wss%3A%2F%2Ftracker.btorrent.xyz&tr=wss%3A%2F%2Ftracker.fastcast.nz&tr=wss%3A%2F%2Ftracker.openwebtorrent.com&tr=wss%3A%2F%2Ftracker.webtorrent.io&ws=https%3A%2F%2Fwebtorrent.io%2Ftorrents%2Fsintel-1024-surround.mp4" var parsedTorrent = magnet(magnetURI) var client = new Tracker(peerId, port, parsedTorrent) client.scrape() client.on('scrape', function (data) { console.log(data) }) ``` Bundle up `scrape.js` and it's dependencies into a single file called `bundle.js`: ```bash browserify scrape.js -o bundle.js` ``` `index.html`: ```js ``` Open `index.html` in your browser.