diff --git a/app.js b/app.js
new file mode 100644
index 0000000..28a1056
--- /dev/null
+++ b/app.js
@@ -0,0 +1,65 @@
+var express = require('express');
+var fs = require('fs');
+
+var NPM_PATH = process.env.HOME + '/.npm';
+var REGISTRY_NAME = 'registry.npmjs.org';
+var LOCAL_REGISTRY = 'localhost:8080';
+
+
+var app = express();
+
+function patchData( data ){
+  Object.keys(data.versions).forEach( function( v ){
+    var val = data.versions[v];
+    val.dist.tarball = val.dist.tarball.replace( REGISTRY_NAME, LOCAL_REGISTRY );
+  });
+}
+
+
+app.use( function(req, res, next ){
+  console.log(req.method, req.path );
+  next();
+});
+
+app.get( '/:package', function( req, res ){
+  var packageName = req.params.package;
+  var cacheFile = [ NPM_PATH, REGISTRY_NAME, packageName, '.cache.json' ].join( '/' );
+  var cacheData = fs.readFileSync( cacheFile, 'utf-8' );
+  cacheData = JSON.parse( cacheData );
+
+  patchData( cacheData );
+  return res.send( cacheData );
+});
+
+app.get( '/:package/-/:packageName-:version.tgz', function( req, res ){
+  var packageName = req.params.package;
+  var version = req.params.version.split('-').pop();
+  var packagePath = [ NPM_PATH , packageName, version, 'package.tgz'].join( '/' );
+  return fs.createReadStream( packagePath ).pipe( res );
+});
+
+
+// catch 404 and forward to error handler
+app.use(function(req, res, next) {
+  var err = new Error('Not Found');
+  err.status = 404;
+  next(err);
+});
+
+// error handlers
+
+// development error handler
+// will print stacktrace
+if (app.get('env') === 'development') {
+  app.use(function(err, req, res, next) {
+    res.status(err.status || 500);
+    res.send({
+      message: err.message,
+      error: err
+    });
+  });
+}
+
+
+
+module.exports = app;
diff --git a/bin/www b/bin/www
new file mode 100755
index 0000000..3aea8e8
--- /dev/null
+++ b/bin/www
@@ -0,0 +1,90 @@
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require('../app');
+var debug = require('debug')('npm-proxy:server');
+var http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+var port = normalizePort(process.env.PORT || '8080');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+var server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..28df467
--- /dev/null
+++ b/package.json
@@ -0,0 +1,11 @@
+{
+  "name": "npm-offline-registry",
+  "version": "0.0.1",
+  "private": true,
+  "scripts": {
+    "start": "node ./bin/www"
+  },
+  "dependencies": {
+    "express": "~4.13.1"
+  }
+}