diff --git a/src/DeepSeekClient.php b/src/DeepSeekClient.php
index a8d7f01..93c989d 100644
--- a/src/DeepSeekClient.php
+++ b/src/DeepSeekClient.php
@@ -13,10 +13,12 @@
 use DeepSeek\Enums\Requests\QueryFlags;
 use DeepSeek\Enums\Configs\TemperatureValues;
 use DeepSeek\Traits\Resources\{HasChat, HasCoder};
+use DeepSeek\Traits\Client\HasToolsFunctionCalling;
 
 class DeepSeekClient implements ClientContract
 {
     use HasChat, HasCoder;
+    use HasToolsFunctionCalling;
 
     /**
      * PSR-18 HTTP client for making requests.
@@ -58,6 +60,12 @@ class DeepSeekClient implements ClientContract
 
     protected ?string $endpointSuffixes;
 
+    /**
+     * Array of tools for using function calling.
+     * @var array|null $tools
+     */
+    protected ?array $tools;
+
     /**
      * Initialize the DeepSeekClient with a PSR-compliant HTTP client.
      *
@@ -71,6 +79,7 @@ public function __construct(ClientInterface $httpClient)
         $this->requestMethod = 'POST';
         $this->endpointSuffixes = EndpointSuffixes::CHAT->value;
         $this->temperature = (float) TemperatureValues::GENERAL_CONVERSATION->value;
+        $this->tools = null;
     }
 
     public function run(): string
@@ -80,9 +89,9 @@ public function run(): string
             QueryFlags::MODEL->value    => $this->model,
             QueryFlags::STREAM->value   => $this->stream,
             QueryFlags::TEMPERATURE->value   => $this->temperature,
+            QueryFlags::TOOLS->value  => $this->tools,
         ];
-        // Clear queries after sending
-        $this->queries = [];
+
         $this->setResult((new Resource($this->httpClient, $this->endpointSuffixes))->sendRequest($requestData, $this->requestMethod));
         return $this->getResult()->getContent();
     }
@@ -120,6 +129,17 @@ public function query(string $content, ?string $role = "user"): self
         $this->queries[] = $this->buildQuery($content, $role);
         return $this;
     }
+    
+    /**
+     * Reset a queries list to empty.
+     *
+     * @return self The current instance for method chaining.
+     */
+    public function resetQueries()
+    {
+        $this->queries = [];
+        return $this;
+    }
 
     /**
      * get list of available models .
@@ -173,7 +193,7 @@ public function buildQuery(string $content, ?string $role = null): array
 
     /**
      * set result model
-     * @param \DeepseekPhp\Contracts\Models\ResultContract $result
+     * @param \DeepSeek\Contracts\Models\ResultContract $result
      * @return self The current instance for method chaining.
      */
     public function setResult(ResultContract $result)
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';
 }
diff --git a/src/Traits/Client/HasToolsFunctionCalling.php b/src/Traits/Client/HasToolsFunctionCalling.php
new file mode 100644
index 0000000..97d53fc
--- /dev/null
+++ b/src/Traits/Client/HasToolsFunctionCalling.php
@@ -0,0 +1,66 @@
+<?php
+
+namespace DeepSeek\Traits\Client;
+
+use DeepSeek\Enums\Queries\QueryRoles;
+
+trait HasToolsFunctionCalling
+{
+    /**
+     * @param array $tools A list of tools the model may call.
+     * @return self The current instance for method chaining.
+     */
+    public function setTools(array $tools): self
+    {
+        $this->tools = $tools;
+        return $this;
+    }
+
+    /**
+     * Add a query tool calls to the accumulated queries list.
+     *
+     * @param array $toolCalls The tool calls generated by the model, such as function calls.
+     * @param string $content
+     * @param string|null $role
+     * @return self The current instance for method chaining.
+     */
+    public function queryToolCall(array $toolCalls, string $content, ?string $role = null): self
+    {
+        $this->queries[] = $this->buildToolCallQuery($toolCalls, $content, $role);
+        return $this;
+    }
+
+    public function buildToolCallQuery(array $toolCalls, string $content, ?string $role = null): array
+    {
+        $query = [
+            'role' => $role ?: QueryRoles::ASSISTANT->value,
+            'tool_calls' => $toolCalls,
+            'content' => $content,
+        ];
+        return $query;
+    }
+
+    /**
+     * Add a query tool to the accumulated queries list.
+     *
+     * @param string $toolCallId
+     * @param string $content
+     * @param string|null $role
+     * @return self The current instance for method chaining.
+     */
+    public function queryTool(string $toolCallId, string $content , ?string $role = null): self
+    {
+        $this->queries[] = $this->buildToolQuery($toolCallId, $content, $role);
+        return $this;
+    }
+
+    public function buildToolQuery(string $toolCallId, string $content, ?string $role): array
+    {
+        $query = [
+            'role' => $role ?: QueryRoles::TOOL->value,
+            'tool_call_id' => $toolCallId,
+            'content' => $content,
+        ];
+        return $query;
+    }
+}
diff --git a/tests/Feature/ClientDependency/FakeResponse.php b/tests/Feature/ClientDependency/FakeResponse.php
new file mode 100644
index 0000000..3b1b725
--- /dev/null
+++ b/tests/Feature/ClientDependency/FakeResponse.php
@@ -0,0 +1,69 @@
+<?php
+
+namespace Tests\Feature\ClientDependency;
+
+class FakeResponse 
+{
+    public function toolFunctionCalling()
+    {
+        return <<<responseAPI
+            {
+                "id": "930c60df-bf64-41c9-a88e-3ec75f81e00e",
+                "choices": [
+                    {
+                        "finish_reason": "stop",
+                        "index": 0,
+                        "message": {
+                            "content": "What is the weather like in Cairo?",
+                            "tool_calls": [
+                                {
+                                    "id": "930c60df-3ec75f81e00e",
+                                    "type": "function",
+                                    "function": {
+                                        "name": "get_weather",
+                                        "arguments": {"city": "Cairo"}
+                                    }
+                                }
+                            ],
+                            "role": "assistant"
+                        }
+                    }
+                ],
+                "created": 1705651092,
+                "model": "deepseek-chat",
+                "object": "chat.completion",
+                "usage": {
+                    "completion_tokens": 10,
+                    "prompt_tokens": 16,
+                    "total_tokens": 26
+                }
+            }
+        responseAPI;
+    }
+    public function resultToolFunctionCalling()
+    {
+        return <<<responseAPI
+            {
+                "id": "930c60df-bf64-41c9-a88e-3ec75f81e00e",
+                "choices": [
+                    {
+                        "finish_reason": "stop",
+                        "index": 0,
+                        "message": {
+                            "content": "The weather in Cairo is sunny with a temperature of 22 degrees.",
+                            "role": "assistant"
+                        }
+                    }
+                ],
+                "created": 1705651092,
+                "model": "deepseek-chat",
+                "object": "chat.completion",
+                "usage": {
+                    "completion_tokens": 10,
+                    "prompt_tokens": 16,
+                    "total_tokens": 26
+                }
+            }
+        responseAPI;
+    }
+}
\ No newline at end of file
diff --git a/tests/Feature/FunctionCallingTest.php b/tests/Feature/FunctionCallingTest.php
new file mode 100644
index 0000000..041e153
--- /dev/null
+++ b/tests/Feature/FunctionCallingTest.php
@@ -0,0 +1,157 @@
+<?php
+namespace Tests\Feature;
+
+use DeepSeek\DeepSeekClient;
+use DeepSeek\Enums\Requests\HTTPState;
+use Mockery;
+use Mockery\{LegacyMockInterface,MockInterface};
+use Tests\Feature\ClientDependency\FakeResponse;
+
+
+function get_weather($city)
+{
+    $city = strtolower($city);
+    $city = match($city){
+        "cairo" => ["temperature"=> 22, "condition" => "Sunny"],
+        "gharbia" => ["temperature"=> 23, "condition" => "Sunny"],
+        "sharkia" => ["temperature"=> 24, "condition" => "Sunny"],
+        "beheira" => ["temperature"=> 21, "condition" => "Sunny"],
+        default => "not found city name."
+    };
+    return json_encode($city);
+}
+
+test('Test function calling with fake responses.', function () {
+    // Arrange
+    $fake = new FakeResponse();
+
+    /** @var DeepSeekClient&LegacyMockInterface&MockInterface */
+    $mockClient = Mockery::mock(DeepSeekClient::class); 
+    
+    $mockClient->shouldReceive('build')->andReturn($mockClient);
+    $mockClient->shouldReceive('setTools')->andReturn($mockClient);
+    $mockClient->shouldReceive('query')->andReturn($mockClient);
+    $mockClient->shouldReceive('run')->once()->andReturn($fake->toolFunctionCalling());
+    
+    // Act
+    $response = $mockClient::build('your-api-key')
+        ->query('What is the weather like in Cairo?')
+        ->setTools([
+            [
+                "type" => "function",
+                "function" => [
+                    "name" => "get_weather",
+                    "description" => "Get the current weather in a given city",
+                    "parameters" => [
+                        "type" => "object",
+                        "properties" => [
+                            "city" => [
+                                "type" => "string",
+                                "description" => "The city name",
+                            ],
+                        ],
+                        "required" => ["city"],
+                    ],
+                ],
+            ],
+        ]
+    )->run();
+
+    // Assert
+    expect($fake->toolFunctionCalling())->toEqual($response);
+    
+    //------------------------------------------
+    
+    // Arrange    
+    $response = json_decode($response, true);
+    $message = $response['choices'][0]['message'];
+    
+    $firstFunction = $message['tool_calls'][0];
+        if ($firstFunction['function']['name'] == "get_weather")
+    {
+        $weather_data = get_weather($firstFunction['function']['arguments']['city']);
+    }
+
+    $mockClient->shouldReceive('queryCallTool')->andReturn($mockClient);
+    $mockClient->shouldReceive('queryTool')->andReturn($mockClient);
+    $mockClient->shouldReceive('run')->andReturn($fake->resultToolFunctionCalling());
+    
+    // Act
+    $response2 = $mockClient->queryCallTool(
+            $message['tool_calls'],
+            $message['content'],
+            $message['role']
+        )->queryTool(
+            $firstFunction['id'],
+            $weather_data,
+            'tool'
+    )->run();
+
+    // Assert
+    expect($fake->resultToolFunctionCalling())->toEqual($response2);
+});
+
+test('Test function calling use base data with real responses.', function () {
+    // Arrange
+    $client = DeepSeekClient::build('your-api-key')
+        ->query('What is the weather like in Cairo?')
+        ->setTools([
+            [
+                "type" => "function",
+                "function" => [
+                    "name" => "get_weather",
+                    "description" => "Get the current weather in a given city",
+                    "parameters" => [
+                        "type" => "object",
+                        "properties" => [
+                            "city" => [
+                                "type" => "string",
+                                "description" => "The city name",
+                            ],
+                        ],
+                        "required" => ["city"],
+                    ],
+                ],
+            ],
+        ]
+    );
+    
+    // Act
+    $response = $client->run();
+    $result = $client->getResult();
+
+    // Assert
+    expect($response)->not()->toBeEmpty($response)
+        ->and($result->getStatusCode())->toEqual(HTTPState::OK->value);
+
+    //-----------------------------------------------------------------
+
+    // Arrange
+    $response = json_decode($response, true);
+
+    $message = $response['choices'][0]['message'];
+    $firstFunction = $message['tool_calls'][0];
+    if ($firstFunction['function']['name'] == "get_weather")
+    {
+        $args = json_decode($firstFunction['function']['arguments'], true);
+        $weather_data = get_weather($args['city']);
+    }
+    
+    $client2 = $client->queryToolCall(
+            $message['tool_calls'],
+            $message['content'],
+            $message['role']
+        )->queryTool(
+            $firstFunction['id'],
+            $weather_data,
+            'tool'
+    );
+    
+    // Act
+    $response2 = $client2->run();
+    $result2 = $client2->getResult();
+
+    // Assert
+    expect($response2)->not()->toBeEmpty($response2)
+        ->and($result2->getStatusCode())->toEqual(HTTPState::OK->value);
+});