diff --git a/composer.json b/composer.json
index a174c7f..b221f9d 100644
--- a/composer.json
+++ b/composer.json
@@ -17,12 +17,13 @@
     ],
     "require": {
         "php": "^8.4",
-        "spatie/laravel-package-tools": "^1.16",
-        "illuminate/contracts": "^10.0||^11.0||^12.0",
         "ext-curl": "*",
         "ext-json": "*",
+        "guzzlehttp/guzzle": "7.x",
+        "illuminate/contracts": "^10.0||^11.0||^12.0",
         "league/oauth2-client": "^2",
-        "guzzlehttp/guzzle": "7.x"
+        "spatie/laravel-data": "^4.15",
+        "spatie/laravel-package-tools": "^1.16"
     },
     "require-dev": {
         "laravel/pint": "^1.14",
diff --git a/src/DTOs/CompaignDTO.php b/src/DTOs/CompaignDTO.php
index 67fd6e9..fc56d23 100644
--- a/src/DTOs/CompaignDTO.php
+++ b/src/DTOs/CompaignDTO.php
@@ -2,7 +2,9 @@
 
 namespace Coderflex\LaravelSendy\DTOs;
 
-class CompaignDTO
+use Spatie\LaravelData\Data;
+
+class CompaignDTO extends Data
 {
     public function __construct(
         //
diff --git a/src/DTOs/SubscribersDTO.php b/src/DTOs/SubscribersDTO.php
index 23d8e8d..8aed236 100644
--- a/src/DTOs/SubscribersDTO.php
+++ b/src/DTOs/SubscribersDTO.php
@@ -2,7 +2,9 @@
 
 namespace Coderflex\LaravelSendy\DTOs;
 
-class SubscribersDTO
+use Spatie\LaravelData\Data;
+
+class SubscribersDTO extends Data
 {
     public function __construct(
         //
diff --git a/src/LaravelSendy.php b/src/LaravelSendy.php
index f018533..d75fa91 100644
--- a/src/LaravelSendy.php
+++ b/src/LaravelSendy.php
@@ -6,9 +6,30 @@
 use Coderflex\LaravelSendy\Resources\Resources\Campaigns;
 use Coderflex\LaravelSendy\Resources\Resources\Lists;
 use Coderflex\LaravelSendy\Resources\Resources\Subscribers;
+use Exception;
+use GuzzleHttp\Client;
+use GuzzleHttp\Exception\ClientException;
 
 class LaravelSendy
 {
+    protected string $apiKey;
+
+    protected string $apiUrl;
+
+    public function __construct()
+    {
+        if (blank(config('laravel-sendy.api_key'))) {
+            throw new Exception('API Key is not set in the config file.');
+        }
+
+        if (blank(config('laravel-sendy.api_url'))) {
+            throw new Exception('API URL is not set in the config file.');
+        }
+
+        $this->apiKey = config('laravel-sendy.api_key');
+        $this->apiUrl = config('laravel-sendy.api_url');
+    }
+
     public function subscribers(): Subscribers
     {
         return new Subscribers;
@@ -28,4 +49,65 @@ public function campaigns(): Campaigns
     {
         return new Campaigns;
     }
+
+    public function __call(string $function, array $args)
+    {
+        $options = ['get', 'post', 'put', 'delete', 'patch'];
+        $path = (isset($args[0])) ? $args[0] : null;
+        $data = (isset($args[1])) ? $args[1] : [];
+        $headers = (isset($args[2])) ? $args[2] : [];
+
+        if (! in_array($function, $options)) {
+            throw new Exception("Method {$function} not found.");
+        }
+
+        return self::guzzle(
+            type: $function,
+            request: $path,
+            data: $data,
+            headers: $headers
+        );
+    }
+
+    /**
+     * @throws \Exception
+     */
+    protected function guzzle(string $type, string $request, array $data = [], array $headers = []): mixed
+    {
+        try {
+            $client = new Client;
+
+            $mainHeaders = [
+                'Content-Type' => 'application/json',
+                'Accept' => 'application/json',
+                'Authorization' => 'Bearer '.$this->apiKey,
+            ];
+
+            $headers = is_array($headers) && count($headers) > 0
+                ? array_merge($mainHeaders, $headers)
+                : $mainHeaders;
+
+            $response = $client->$type($this->apiUrl.$request, [
+                'headers' => $headers,
+                'body' => json_encode($data),
+            ]);
+
+            $responseObject = $response->getBody()->getContents();
+
+            return $this->isJson($responseObject)
+                ? json_decode($responseObject, true)
+                : $responseObject;
+
+        } catch (ClientException $th) {
+            throw new Exception('Error: '.$th->getMessage());
+        } catch (Exception $th) {
+            throw new Exception('Error: '.$th->getMessage());
+        }
+    }
+
+    protected function isJson(string $string): bool
+    {
+        return is_array(json_decode($string)) &&
+            (json_last_error() === JSON_ERROR_NONE);
+    }
 }
diff --git a/src/Resources/Brands.php b/src/Resources/Brands.php
index c7f9d2b..03da1af 100644
--- a/src/Resources/Brands.php
+++ b/src/Resources/Brands.php
@@ -2,10 +2,12 @@
 
 namespace Coderflex\LaravelSendy\Resources\Resources;
 
+use Coderflex\LaravelSendy\Facades\LaravelSendy;
+
 class Brands
 {
     public function get()
     {
-        //
+        return LaravelSendy::get('/api/brands/get-brands.php');
     }
 }
diff --git a/src/Resources/Campaigns.php b/src/Resources/Campaigns.php
index ecf3957..6338fb0 100644
--- a/src/Resources/Campaigns.php
+++ b/src/Resources/Campaigns.php
@@ -2,10 +2,18 @@
 
 namespace Coderflex\LaravelSendy\Resources\Resources;
 
+use Coderflex\LaravelSendy\DTOs\CompaignDTO;
+use Coderflex\LaravelSendy\Facades\LaravelSendy;
+
 class Campaigns
 {
     public function create(array $data)
     {
-        //
+        $data = CompaignDTO::from($data)->toArray();
+
+        // validate the data
+        // $this->validate($data);
+
+        return LaravelSendy::post('/api/campaigns/create.php', $data);
     }
 }
diff --git a/src/Resources/Lists.php b/src/Resources/Lists.php
index ad5c261..82a5f78 100644
--- a/src/Resources/Lists.php
+++ b/src/Resources/Lists.php
@@ -2,10 +2,22 @@
 
 namespace Coderflex\LaravelSendy\Resources\Resources;
 
+use Coderflex\LaravelSendy\Facades\LaravelSendy;
+
 class Lists
 {
+    /**
+     * Get all lists for a specific brand.
+     *
+     * @return array
+     */
     public function get(int $brandId, bool $includeHidden = false)
     {
-        // Implementation to get lists
+        $params = http_build_query([
+            'brand_id' => $brandId,
+            'include_hidden' => $includeHidden,
+        ]);
+
+        return LaravelSendy::get('/api/lists/get-lists.php', $params);
     }
 }
diff --git a/src/Resources/Subscribers.php b/src/Resources/Subscribers.php
index 53248af..382b322 100644
--- a/src/Resources/Subscribers.php
+++ b/src/Resources/Subscribers.php
@@ -2,25 +2,57 @@
 
 namespace Coderflex\LaravelSendy\Resources\Resources;
 
+use Coderflex\LaravelSendy\DTOs\SubscribersDTO;
+use Coderflex\LaravelSendy\Facades\LaravelSendy;
+
 class Subscribers
 {
     public function subscribe(array $data)
     {
-        //
+        $data = SubscribersDTO::from($data)->toArray();
+
+        // validate the data
+
+        return LaravelSendy::post('subscribe', $data);
     }
 
-    public function unsubscribe(int $listId, string $email)
+    public function unsubscribe(int $listId, string $email, bool $plainTextResponse)
     {
-        //
+        $data = http_build_query([
+            'list' => $listId,
+            'email' => $email,
+            'boolean' => $plainTextResponse,
+        ]);
+
+        return LaravelSendy::post('/api/subscribers/unsubscribe.php', $data);
     }
 
     public function delete(int $listId, string $email)
     {
-        //
+        $data = http_build_query([
+            'list_id' => $listId,
+            'email' => $email,
+        ]);
+
+        return LaravelSendy::post('/api/subscribers/delete.php', $data);
+    }
+
+    public function status(int $listId, string $email)
+    {
+        $data = http_build_query([
+            'list_id' => $listId,
+            'email' => $email,
+        ]);
+
+        return LaravelSendy::post('/api/subscribers/subscription-status.php', $data);
     }
 
     public function count(int $listId)
     {
-        //
+        $data = http_build_query([
+            'list_id' => $listId,
+        ]);
+
+        return LaravelSendy::post('/api/subscribers/active-subscriber-count.php', $data);
     }
 }