diff --git a/changelog.md b/changelog.md
index dfbd7eb..b9ab699 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,7 @@
+# v6.0.2
+
+* An extension point has been added for flexibility
+
 # v6.0.0
 
 Since phpcent v6.0.0 we do not maintain CHANGELOG.md file.
diff --git a/src/Client.php b/src/Client.php
index 3c0cd6c..94f5eec 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -9,7 +9,7 @@
  * @copyright  Copyright (c) 2019 Centrifugal
  * @license    The MIT License (MIT)
  */
-class Client
+class Client implements ClientInterface
 {
     private $url;
     private $apikey;
@@ -273,7 +273,7 @@ public function historyRemove($channel)
 
     /**
      * Get all active channels.
-     * 
+     *
      * @param string $pattern (optional)
      * @return mixed
      */
diff --git a/src/ClientInterface.php b/src/ClientInterface.php
new file mode 100644
index 0000000..d16cfab
--- /dev/null
+++ b/src/ClientInterface.php
@@ -0,0 +1,151 @@
+<?php
+
+namespace phpcent;
+
+/**
+ * Centrifugo API Client
+ *
+ * @package    phpcent
+ * @copyright  Copyright (c) 2019 Centrifugal
+ * @license    The MIT License (MIT)
+ */
+interface ClientInterface
+{
+    /**
+     * Publish data into channel.
+     *
+     * @param  string   $channel
+     * @param  array    $data
+     * @param  boolean  $skipHistory  (optional)
+     *
+     * @return mixed
+     */
+    public function publish($channel, $data, $skipHistory = false);
+
+    /**
+     * Broadcast the same data into multiple channels.
+     *
+     * @param  array    $channels
+     * @param  array    $data
+     * @param  boolean  $skipHistory  (optional)
+     *
+     * @return mixed
+     */
+    public function broadcast($channels, $data, $skipHistory = false);
+
+    /**
+     * Subscribe user to channel.
+     *
+     * @param  string  $channel
+     * @param  string  $user
+     * @param  string  $client  (optional)
+     *
+     * @return mixed
+     */
+    public function subscribe($channel, $user, $client = '');
+
+    /**
+     * Unsubscribe user from channel.
+     *
+     * @param  string  $channel
+     * @param  string  $user
+     * @param  string  $client  (optional)
+     *
+     * @return mixed
+     */
+    public function unsubscribe($channel, $user, $client = '');
+
+    /**
+     * Disconnect user.
+     *
+     * @param  string  $user
+     * @param  string  $client  (optional)
+     *
+     * @return mixed
+     */
+    public function disconnect($user, $client = '');
+
+    /**
+     * Get channel presence info.
+     *
+     * @param  string  $channel
+     *
+     * @return mixed
+     */
+    public function presence($channel);
+
+    /**
+     * Get channel presence stats.
+     *
+     * @param  string  $channel
+     *
+     * @return mixed
+     */
+    public function presenceStats($channel);
+
+    /**
+     * Get channel history.
+     *
+     * @param  string   $channel
+     * @param  int      $limit    (optional)
+     * @param  array    $since    (optional)
+     * @param  boolean  $reverse  (optional)
+     *
+     * @return mixed
+     */
+    public function history($channel, $limit = 0, $since = array(), $reverse = false);
+
+    /**
+     * Get all active channels.
+     *
+     * @param  string  $pattern  (optional)
+     *
+     * @return mixed
+     */
+    public function channels($pattern = '');
+
+    /**
+     * Get server info.
+     *
+     * @return mixed
+     */
+    public function info();
+
+    /**
+     * Sending many commands in one request
+     *
+     * @param  array  $data
+     *
+     * @return mixed
+     */
+    public function batch(array $data);
+
+    /**
+     * Generate connection JWT. See https://centrifugal.dev/docs/server/authentication.
+     * Keep in mind that this method does not support all claims of Centrifugo JWT connection
+     * token at this point. You can use any JWT library to generate Centrifugo tokens.
+     *
+     * @param  string  $userId  - current user ID as string.
+     * @param  int     $exp     - time in the future as unix seconds for token expiration.
+     * @param  array   $info
+     * @param  array   $channels
+     * @param  array   $meta
+     *
+     * @return string
+     */
+    public function generateConnectionToken($userId, $exp = 0, $info = array(), $channels = array(), $meta = array());
+
+    /**
+     * Generate subscription JWT. See https://centrifugal.dev/docs/server/channel_token_auth.
+     * Keep in mind that this method does not support all claims of Centrifugo JWT subscription
+     * token at this point. You can use any JWT library to generate Centrifugo tokens.
+     *
+     * @param  string  $userId   - current user ID as string.
+     * @param  string  $channel  - channel token generated for.
+     * @param  int     $exp      - time in the future as unix seconds for token expiration.
+     * @param  array   $info
+     *
+     * @return string
+     */
+    public function generateSubscriptionToken($userId, $channel, $exp = 0, $info = array());
+}