diff --git a/README.md b/README.md
index 1ec6776..dd35c2b 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 <p align="center">
   <h1 align="center">DeepSeek PHP Client</h1>
   <p align="center">🚀 Community-Driven PHP SDK for DeepSeek AI API Integration</p>
-  
+
   <p align="center">
     <a href="https://packagist.org/packages/deepseek-php/deepseek-php-client">
       <img src="https://img.shields.io/packagist/v/deepseek-php/deepseek-php-client" alt="Latest Version">
@@ -29,6 +29,7 @@
   - [Advanced Configuration](#advanced-configuration)
   - [Use with Symfony HttpClient](#use-with-symfony-httpclient)
   - [Get Models List](#get-models-list)
+  - [Function Calling](#function-calling)
   - [Framework Integration](#-framework-integration)
 - [🆕 Migration Guide](#-migration-guide)
 - [📝 Changelog](#-changelog)
@@ -103,7 +104,7 @@ echo 'API Response:'.$response;
 
 ### Use with Symfony HttpClient
 the package already built with `symfony Http client`,  if you need to use package with `symfony` Http Client , it is easy to achieve that, just pass `clientType:'symfony'` with `build` function.
- 
+
 ex with symfony:
 
 ```php
@@ -128,6 +129,42 @@ $response = DeepSeekClient::build('your-api-key')
 echo $response; // {"object":"list","data":[{"id":"deepseek-chat","object":"model","owned_by":"deepseek"},{"id":"deepseek-reasoner","object":"model","owned_by":"deepseek"}]}
 ```
 
+### Function Calling
+
+Function Calling allows the model to call external tools to enhance its capabilities.
+
+[please check original DeepSeek Doc](https://api-docs.deepseek.com/guides/function_calling)
+
+```php
+use DeepSeek\DeepSeekClient;
+use DeepSeek\Enums\Models;
+
+$response = DeepSeekClient::build('your-api-key')
+    ->withModel(Models::CHAT)
+    ->withTools([    
+        [
+            'type' => 'function',
+            'function' => [
+                'name' => 'get_weather',
+                'description' => 'Get weather of an location, the user shoud supply a location first',
+                'parameters' => [
+                    'type' => 'object',
+                    'properties' => [
+                        'location' => [
+                            'type' => 'string',
+                            'description' => 'The city and state, e.g. San Francisco, CA',
+                        ],
+                    ],
+                    'required' => ['location'],
+                ],
+            ],
+        ],
+    ])
+    ->run();
+
+echo 'API Response:'.$response;
+````
+
 ### 🛠 Framework Integration
 
 ### [Laravel Deepseek Package](https://github.com/deepseek-php/deepseek-laravel)
@@ -178,7 +215,7 @@ Click the button bellow or [join here](https://t.me/deepseek_php_community) to b
 
 ## 🔒 Security
 
-**Report Vulnerabilities**: to [omaralwi2010@gmail.com](mailto:omaralwi2010@gmail.com)   
+**Report Vulnerabilities**: to [omaralwi2010@gmail.com](mailto:omaralwi2010@gmail.com)
 
 ---
 
diff --git a/src/Contracts/ClientContract.php b/src/Contracts/ClientContract.php
index 12172e3..8ebe15d 100644
--- a/src/Contracts/ClientContract.php
+++ b/src/Contracts/ClientContract.php
@@ -6,9 +6,9 @@ interface ClientContract
 {
     public function run(): string;
     public static function build(string $apiKey, ?string $baseUrl = null, ?int $timeout = null): self;
-    public function query(string $content, ?string $role = "user"): self;
+    public function query(?string $content = null, ?string $role = "user", ?string $toolCallId = null, ?array $toolCalls = null,): self;
     public function getModelsList(): self;
     public function withModel(?string $model = null): self;
     public function withStream(bool $stream = true): self;
-    public function buildQuery(string $content, ?string $role = null): array;
+    public function buildQuery(?string $content = null, ?string $role = null, ?string $toolCallId = null, ?array $toolCalls = null,): array;
 }
diff --git a/src/DeepSeekClient.php b/src/DeepSeekClient.php
index a8d7f01..0ba2843 100644
--- a/src/DeepSeekClient.php
+++ b/src/DeepSeekClient.php
@@ -58,6 +58,8 @@ class DeepSeekClient implements ClientContract
 
     protected ?string $endpointSuffixes;
 
+    protected array $tools = [];
+
     /**
      * Initialize the DeepSeekClient with a PSR-compliant HTTP client.
      *
@@ -81,6 +83,9 @@ public function run(): string
             QueryFlags::STREAM->value   => $this->stream,
             QueryFlags::TEMPERATURE->value   => $this->temperature,
         ];
+        if (count($this->tools)) {
+            $requestData[QueryFlags::TOOLS->value] = $this->tools;
+        }
         // Clear queries after sending
         $this->queries = [];
         $this->setResult((new Resource($this->httpClient, $this->endpointSuffixes))->sendRequest($requestData, $this->requestMethod));
@@ -111,13 +116,20 @@ public static function build(string $apiKey, ?string $baseUrl = null, ?int $time
     /**
      * Add a query to the accumulated queries list.
      *
-     * @param string $content
+     * @param string|null $content
      * @param string|null $role
+     * @param string|null $toolCallId
+     * @param array|null $toolCalls
      * @return self The current instance for method chaining.
      */
-    public function query(string $content, ?string $role = "user"): self
+    public function query(
+        ?string $content = null,
+        ?string $role = null,
+        ?string $toolCallId = null,
+        ?array $toolCalls = null,
+    ): self
     {
-        $this->queries[] = $this->buildQuery($content, $role);
+        $this->queries[] = $this->buildQuery($content, $role, $toolCallId, $toolCalls);
         return $this;
     }
 
@@ -163,12 +175,33 @@ public function setTemperature(float $temperature): self
         return $this;
     }
 
-    public function buildQuery(string $content, ?string $role = null): array
+    public function setTools(array $tools): self
+    {
+        $this->tools = $tools;
+        return $this;
+    }
+
+    public function buildQuery(
+    ?string $content = null,
+    ?string $role = null,
+    ?string $toolCallId = null,
+    ?array $toolCalls = null,
+): array
     {
-        return [
+        $query = [
             'role' => $role ?: QueryRoles::USER->value,
-            'content' => $content
         ];
+        if ($content !== null) {
+            $query['content'] = $content;
+        }
+        if ($toolCallId !== null) {
+            $query['tool_call_id'] = $toolCallId;
+        }
+        if ($toolCalls !== null) {
+            $query['tool_calls'] = $toolCalls;
+        }
+
+        return $query;
     }
 
     /**
diff --git a/src/Enums/Queries/QueryRoles.php b/src/Enums/Queries/QueryRoles.php
index 4659084..a23925c 100644
--- a/src/Enums/Queries/QueryRoles.php
+++ b/src/Enums/Queries/QueryRoles.php
@@ -6,4 +6,6 @@ enum QueryRoles: string
 {
     case USER = 'user';
     case SYSTEM = 'system';
+    case ASSISTANT = 'assistant';
+    case TOOL = 'tool';
 }
diff --git a/src/Enums/Requests/QueryFlags.php b/src/Enums/Requests/QueryFlags.php
index 19c1cdd..0e2b49a 100644
--- a/src/Enums/Requests/QueryFlags.php
+++ b/src/Enums/Requests/QueryFlags.php
@@ -8,4 +8,5 @@ enum QueryFlags: string
     case MODEL = 'model';
     case STREAM = 'stream';
     case TEMPERATURE = 'temperature';
+    case TOOLS = 'tools';
 }