diff --git a/src/WooCommerce/Client.php b/src/WooCommerce/Client.php
index 537313d..83a45f0 100644
--- a/src/WooCommerce/Client.php
+++ b/src/WooCommerce/Client.php
@@ -30,6 +30,11 @@ class Client
      */
     public $http;
 
+    /**
+     * @var string $id
+     */
+    private $id;
+
     /**
      * Initialize client.
      *
@@ -41,6 +46,7 @@ class Client
     public function __construct($url, $consumerKey, $consumerSecret, $options = [])
     {
         $this->http = new HttpClient($url, $consumerKey, $consumerSecret, $options);
+        $this->id = md5($url);
     }
 
     /**
@@ -106,4 +112,9 @@ public function options($endpoint)
     {
         return $this->http->request($endpoint, 'OPTIONS', [], []);
     }
+
+    public function getId()
+    {
+        return $this->id;
+    }
 }