diff --git a/main/mashape/http/AuthUtil.php b/main/mashape/http/AuthUtil.php
new file mode 100644
index 0000000..646ab37
--- /dev/null
+++ b/main/mashape/http/AuthUtil.php
@@ -0,0 +1,38 @@
+<?php
+
+/*
+ * Mashape PHP Client library.
+ *
+ * Copyright (C) 2011 Mashape, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *
+ * The author of this software is Mashape, Inc.
+ * For any question or feedback please contact us at: support@mashape.com
+ *
+ */
+
+class AuthUtil {
+
+	public static function generateAuthenticationHeader($publicKey, $privateKey) {
+		$uuid = uniqid();
+		$hash = hash_hmac("sha1", $uuid, $privateKey);
+		$header = "X-Mashape-Authorization: " . base64_encode($publicKey . ":" . $hash . $uuid) . "\r\n";
+		return $header;
+	}
+
+}
+
+?>