diff --git a/src/Client.php b/src/Client.php
index 43f8b7f..e45956c 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -10,6 +10,7 @@
 
 namespace EcomPHP\TiktokShop;
 
+use EcomPHP\TiktokShop\Resources\CustomerService;
 use GuzzleHttp\HandlerStack;
 use GuzzleHttp\Client as GuzzleHttpClient;
 use GuzzleHttp\Middleware;
@@ -77,6 +78,7 @@ class Client
         Supplychain::class,
         Event::class,
         ReturnRefund::class,
+        CustomerService::class,
     ];
 
     public function __construct($app_key, $app_secret, $options = [])
diff --git a/src/Resources/CustomerService.php b/src/Resources/CustomerService.php
new file mode 100644
index 0000000..464b019
--- /dev/null
+++ b/src/Resources/CustomerService.php
@@ -0,0 +1,90 @@
+<?php
+/*
+ * This file is part of tiktokshop-client.
+ *
+ * Copyright (c) 2024 Jin <j@sax.vn> All rights reserved.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace EcomPHP\TiktokShop\Resources;
+
+use EcomPHP\TiktokShop\Resource;
+use GuzzleHttp\RequestOptions;
+
+class CustomerService extends Resource
+{
+    protected $category = 'customer_service';
+
+    public function getConversationMessages($conversation_id, $params = [])
+    {
+        $params = array_merge([
+            'page_size' => 20,
+        ], $params);
+
+        return $this->call('GET', 'conversations/'.$conversation_id.'/messages', [
+            RequestOptions::QUERY => $params,
+        ]);
+    }
+
+    public function getConversations($params = [])
+    {
+        $params = array_merge([
+            'page_size' => 20,
+        ], $params);
+
+        return $this->call('GET', 'conversations', [
+            RequestOptions::QUERY => $params,
+        ]);
+    }
+
+    public function sendMessage($conversation_id, $type, $content)
+    {
+        return $this->call('POST', 'conversations/'.$conversation_id.'/messages', [
+            RequestOptions::JSON => [
+                'type' => $type,
+                'content' => is_array($content) ? json_encode($content) : $content,
+            ]
+        ]);
+    }
+
+    public function getAgentSettings()
+    {
+        return $this->call('GET', 'agents/settings');
+    }
+
+    public function updateAgentSettings($body = [])
+    {
+        return $this->call('PUT', 'agents/settings', [
+            RequestOptions::JSON => $body,
+        ]);
+    }
+
+    public function uploadBuyerMessagesImage($image)
+    {
+        return $this->call('POST', 'images/upload', [
+            RequestOptions::MULTIPART => [
+                [
+                    'name' => 'data',
+                    'filename' => 'image',
+                    'contents' => static::dataTypeCast('image', $image),
+                ]
+            ]
+        ]);
+    }
+
+    public function readMessage($conversation_id)
+    {
+        return $this->call('POST', 'conversations/'.$conversation_id.'/messages/read');
+    }
+
+    public function createConversation($buyer_user_id)
+    {
+        return $this->call('POST', 'conversations', [
+            RequestOptions::JSON => [
+                'buyer_user_id' => $buyer_user_id,
+            ]
+        ]);
+    }
+}
diff --git a/tests/Resources/CustomerServiceTest.php b/tests/Resources/CustomerServiceTest.php
new file mode 100644
index 0000000..39b5f8d
--- /dev/null
+++ b/tests/Resources/CustomerServiceTest.php
@@ -0,0 +1,65 @@
+<?php
+/*
+ * This file is part of tiktokshop-client.
+ *
+ * Copyright (c) 2024 Jin <j@sax.vn> All rights reserved.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace EcomPHP\TiktokShop\Tests\Resources;
+
+use EcomPHP\TiktokShop\Resources\CustomerService;
+use EcomPHP\TiktokShop\Tests\TestResource;
+
+class CustomerServiceTest extends TestResource
+{
+    public function testGetConversationMessages()
+    {
+        $this->caller->getConversationMessages('conversation_id');
+        $this->assertPreviousRequest('GET', 'customer_service/'.TestResource::TEST_API_VERSION.'/conversations/conversation_id/messages');
+    }
+
+    public function testGetConversations()
+    {
+        $this->caller->getConversations();
+        $this->assertPreviousRequest('GET', 'customer_service/'.TestResource::TEST_API_VERSION.'/conversations');
+    }
+
+    public function testSendMessage()
+    {
+        $this->caller->sendMessage('conversation_id', 'type', 'content');
+        $this->assertPreviousRequest('POST', 'customer_service/'.TestResource::TEST_API_VERSION.'/conversations/conversation_id/messages');
+    }
+
+    public function testGetAgentSettings()
+    {
+        $this->caller->getAgentSettings();
+        $this->assertPreviousRequest('GET', 'customer_service/'.TestResource::TEST_API_VERSION.'/agents/settings');
+    }
+
+    public function testUpdateAgentSettings()
+    {
+        $this->caller->updateAgentSettings();
+        $this->assertPreviousRequest('PUT', 'customer_service/'.TestResource::TEST_API_VERSION.'/agents/settings');
+    }
+
+    public function testUploadBuyerMessagesImage()
+    {
+        $this->caller->uploadBuyerMessagesImage('php://memory');
+        $this->assertPreviousRequest('POST', 'customer_service/'.TestResource::TEST_API_VERSION.'/images/upload');
+    }
+
+    public function testReadMessage()
+    {
+        $this->caller->readMessage('conversation_id');
+        $this->assertPreviousRequest('POST', 'customer_service/'.TestResource::TEST_API_VERSION.'/conversations/conversation_id/messages/read');
+    }
+
+    public function testCreateConversation()
+    {
+        $this->caller->createConversation('buyer_id');
+        $this->assertPreviousRequest('POST', 'customer_service/'.TestResource::TEST_API_VERSION.'/conversations');
+    }
+}