diff --git a/extdbms/lib/Controllers/DBMS/Client/PaymentController.php b/extdbms/lib/Controllers/DBMS/Client/PaymentController.php
index 78ac5bb..30711d8 100644
--- a/extdbms/lib/Controllers/DBMS/Client/PaymentController.php
+++ b/extdbms/lib/Controllers/DBMS/Client/PaymentController.php
@@ -49,8 +49,10 @@ class PaymentController extends ClientController
         //Client_Code = ["C219"=>WinIDC,"C116"=>IDC-JP"] -> 미지급금계산 제외 Client_Code
         $exclude_clients = ['C116', 'C219'];
         //mode 당일,1일전,2일전,3일전,custom
-        $today = date("Y-m-d");
-        switch ($params['mode']) {
+        $today = date("Y-m-d");;
+        echo var_dump($this->getRequest()->get());
+        exit;
+        switch ($this->getRequest()->get('mode')) {
             case 'today':
                 $this->getServiceService()->getModel()->where("service_payment_date = CURDATE()");
                 $this->message = "[{$today} 기준 당일 ";
diff --git a/extdbms/lib/Core/Controller.php b/extdbms/lib/Core/Controller.php
index eacc97e..6ab13ad 100644
--- a/extdbms/lib/Core/Controller.php
+++ b/extdbms/lib/Core/Controller.php
@@ -5,19 +5,13 @@ namespace lib\Core;
 require_once __DIR__ . DIRECTORY_SEPARATOR . '..' . DIRECTORY_SEPARATOR . 'Configs' . DIRECTORY_SEPARATOR . 'Constant.php';
 
 use lib\Configs\View;
+use lib\Http\Request;
 
 abstract class Controller
 {
-    private $_request = null;
     private ?View $_view = null;
-    protected function __construct()
-    {
-        $this->_view = new View();
-    } //
-    final public function getView(): View
-    {
-        return $this->_view;
-    }
+    private ?Request  $_request = null;
+    protected function __construct() {} //
     final public function __get($name)
     {
         return $this->getView()->$name;
@@ -26,8 +20,22 @@ abstract class Controller
     {
         $this->getView()->$name = $value;
     }
+    final public function getView(): View
+    {
+        if ($this->_view === null) {
+            $this->_view = new View();
+        }
+        return $this->_view;
+    }
     public function render(string $path)
     {
         return $this->getView()->render($path);
     }
+    final public function getRequest(): Request
+    {
+        if ($this->_request === null) {
+            $this->_request = new Request();
+        }
+        return $this->_request;
+    }
 } //Class
diff --git a/extdbms/lib/Http/BearerToken.php b/extdbms/lib/Http/BearerToken.php
new file mode 100644
index 0000000..81fb60f
--- /dev/null
+++ b/extdbms/lib/Http/BearerToken.php
@@ -0,0 +1,15 @@
+<?php
+
+namespace lib\Http;
+
+class BearerToken extends HTTP
+{
+  public function token(): ?string
+  {
+    $header = $this->getHeader('Authorization');
+    if ($header && str_starts_with($header, 'Bearer ')) {
+      return substr($header, 7);
+    }
+    return null;
+  }
+}
diff --git a/extdbms/lib/Http/Cookie.php b/extdbms/lib/Http/Cookie.php
new file mode 100644
index 0000000..c587d7a
--- /dev/null
+++ b/extdbms/lib/Http/Cookie.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace lib\Http;
+
+class Cookie
+{
+  public function get(string $key, $default = null): mixed
+  {
+    return $_COOKIE[$key] ?? $default;
+  }
+
+  public function set(string $key, $value, int $expire = 3600, string $path = '/'): void
+  {
+    setcookie($key, $value, time() + $expire, $path);
+  }
+
+  public function remove(string $key): void
+  {
+    setcookie($key, '', time() - 3600, '/');
+  }
+}
diff --git a/extdbms/lib/Http/Http.php b/extdbms/lib/Http/Http.php
new file mode 100644
index 0000000..77e1ae3
--- /dev/null
+++ b/extdbms/lib/Http/Http.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace lib\Http;
+
+class HTTP
+{
+  protected array $headers = [];
+
+  public function __construct()
+  {
+    $this->headers =         foreach ($_SERVER as $name => $value) {
+      if (str_starts_with($name, 'HTTP_')) {
+          $key = str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))));
+          $headers[$key] = $value;
+      }
+  }
+  }
+
+  public function getHeaders(): array
+  {
+    return $this->headers;
+  }
+
+  public function getHeader(string $key): ?string
+  {
+    return $this->headers[$key] ?? null;
+  }
+}
diff --git a/extdbms/lib/Http/Request.php b/extdbms/lib/Http/Request.php
new file mode 100644
index 0000000..7f45837
--- /dev/null
+++ b/extdbms/lib/Http/Request.php
@@ -0,0 +1,73 @@
+<?php
+
+namespace lib\Http;
+
+class Request extends HTTP
+{
+  protected array $get;
+  protected array $post;
+  protected array $data;
+
+  public function __construct()
+  {
+    parent::__construct();
+
+    $this->get = $_GET;
+    $this->post = $_POST;
+    $this->data = array_merge($_GET, $_POST, json_decode(file_get_contents('php://data'), true) ?? []);
+  }
+
+  public function all(): array
+  {
+    return $this->data;
+  }
+
+  public function get(?string $key = null, $default = null): mixed
+  {
+    if ($key === null) {
+      return $this->all();
+    }
+    return $this->data[$key] ?? $default;
+  }
+
+  public function only(array $keys): array
+  {
+    return array_intersect_key($this->data, array_flip($keys));
+  }
+
+  public function has(string $key): bool
+  {
+    return array_key_exists($key, $this->data);
+  }
+
+  /**
+   * Validator 연동
+   */
+  //사용예:
+  //   $request = new Request();
+
+  // $validation = $request->validate([
+  //     'username' => 'required|alpha_numeric|min[4]',
+  //     'email' => 'required|email',
+  //     'password' => 'required|min[6]'
+  // ]);
+
+  // if ($validation !== true) {
+  //     // 에러 처리
+  //     print_r($validation);
+  // } else {
+  //     // 통과
+  //     echo "유효성 검사 통과!";
+  // }
+  public function validate(array $rules, array $messages = []): bool|array
+  {
+    $validator = new Validator();
+    $validator->setData($this->all())->setRules($rules)->setMessages($messages);
+
+    if (!$validator->run()) {
+      return $validator->errors();
+    }
+
+    return true;
+  }
+}
diff --git a/extdbms/lib/Core/Response.php b/extdbms/lib/Http/Response.php
similarity index 81%
rename from extdbms/lib/Core/Response.php
rename to extdbms/lib/Http/Response.php
index 9ae4a86..bfefacb 100644
--- a/extdbms/lib/Core/Response.php
+++ b/extdbms/lib/Http/Response.php
@@ -1,9 +1,14 @@
 <?php
 
-namespace lib\Core;
+namespace lib\Http;
 
-class Response
+class Response extends HTTP
 {
+  public function __construct()
+  {
+    parent::__construct();
+  }
+
   public static function json($data, int $status = 200)
   {
     http_response_code($status);
diff --git a/extdbms/lib/Http/Session.php b/extdbms/lib/Http/Session.php
new file mode 100644
index 0000000..cc5c345
--- /dev/null
+++ b/extdbms/lib/Http/Session.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace lib\Http;
+
+class Session
+{
+  public function start(): void
+  {
+    if (session_status() === PHP_SESSION_NONE) {
+      session_start();
+    }
+  }
+
+  public function get(string $key, $default = null): mixed
+  {
+    return $_SESSION[$key] ?? $default;
+  }
+
+  public function set(string $key, $value): void
+  {
+    $_SESSION[$key] = $value;
+  }
+
+  public function remove(string $key): void
+  {
+    unset($_SESSION[$key]);
+  }
+
+  public function destroy(): void
+  {
+    session_destroy();
+  }
+}
diff --git a/extdbms/lib/Http/Validator.php b/extdbms/lib/Http/Validator.php
new file mode 100644
index 0000000..987db34
--- /dev/null
+++ b/extdbms/lib/Http/Validator.php
@@ -0,0 +1,148 @@
+<?php
+
+namespace lib\Http;
+
+//사용법
+// $validator = new \lib\Http\Validator();
+
+// $validator->setData([
+//   'username' => 'admin123',
+//   'email' => 'admin@example.com',
+//   'password' => '1234'
+// ])->setRules([
+//   'username' => 'required|alpha_numeric|min[4]|max[20]',
+//   'email' => 'required|email',
+//   'password' => 'required|min[6]'
+// ]);
+
+// if (!$validator->run()) {
+//   print_r($validator->errors());
+// }
+
+class Validator
+{
+  protected array $data = [];
+  protected array $rules = [];
+  protected array $errors = [];
+  protected array $customMessages = [];
+
+  protected array $availableRules = [
+    'required',
+    'min',
+    'max',
+    'email',
+    'numeric',
+    'alpha',
+    'alpha_numeric'
+  ];
+
+  public function setData(array $data): self
+  {
+    $this->data = $data;
+    return $this;
+  }
+
+  public function setRules(array $rules): self
+  {
+    $this->rules = $rules;
+    return $this;
+  }
+
+  public function setMessages(array $messages): self
+  {
+    $this->customMessages = $messages;
+    return $this;
+  }
+
+  public function run(): bool
+  {
+    $this->errors = [];
+
+    foreach ($this->rules as $field => $ruleStr) {
+      $rules = explode('|', $ruleStr);
+      $value = $this->data[$field] ?? null;
+
+      foreach ($rules as $rule) {
+        $param = null;
+        if (strpos($rule, '[') !== false) {
+          preg_match('/(\w+)\[(.*?)\]/', $rule, $matches);
+          $rule = $matches[1];
+          $param = $matches[2];
+        }
+
+        $method = "validate_$rule";
+        if (method_exists($this, $method)) {
+          $result = $this->$method($value, $param);
+          if (!$result) {
+            $this->addError($field, $rule, $param);
+          }
+        }
+      }
+    }
+
+    return empty($this->errors);
+  }
+
+  public function errors(): array
+  {
+    return $this->errors;
+  }
+
+  protected function addError(string $field, string $rule, $param = null): void
+  {
+    $message = $this->customMessages["$field.$rule"] ?? $this->defaultMessage($field, $rule, $param);
+    $this->errors[$field][] = $message;
+  }
+
+  protected function defaultMessage(string $field, string $rule, $param): string
+  {
+    return match ($rule) {
+      'required' => "$field is required.",
+      'min' => "$field must be at least $param characters.",
+      'max' => "$field must be at most $param characters.",
+      'email' => "$field must be a valid email address.",
+      'numeric' => "$field must be a number.",
+      'alpha' => "$field must contain only letters.",
+      'alpha_numeric' => "$field must contain only letters and numbers.",
+      default => "$field is invalid.",
+    };
+  }
+
+  // --- 기본 유효성 검사 메서드 ---
+  protected function validate_required($value): bool
+  {
+    return !empty($value) || $value === '0';
+  }
+
+  protected function validate_min($value, $param): bool
+  {
+    return strlen($value) >= (int)$param;
+  }
+
+  protected function validate_max($value, $param): bool
+  {
+    return strlen($value) <= (int)$param;
+  }
+
+  protected function validate_email($value): bool
+  {
+    return filter_var($value, FILTER_VALIDATE_EMAIL) !== false;
+  }
+
+  protected function validate_numeric($value): bool
+  {
+    return is_numeric($value);
+  }
+
+  protected function validate_alpha($value): bool
+  {
+    return ctype_alpha($value);
+  }
+
+  protected function validate_alpha_numeric($value): bool
+  {
+    return ctype_alnum($value);
+  }
+
+  // 사용자 정의 규칙도 등록할 수 있도록 향후 확장 가능
+}