diff --git a/includes/api/class-publications.php b/includes/api/class-publications.php
new file mode 100644
index 0000000..dd29539
--- /dev/null
+++ b/includes/api/class-publications.php
@@ -0,0 +1,51 @@
+<?php
+/**
+ * @package CleverOgre
+ * @subpackage OgreIssuu
+ * @version 0.1.0
+ * @since 0.1.0
+ */
+
+namespace OgreIssuu\Api;
+
+if (!defined('ABSPATH')) exit;
+
+use stdClass;
+use lasselehtinen\Issuu\Issuu;
+
+class Publications {
+    
+    private Issuu $issuu;
+
+    public function __construct(Issuu $issuu) {
+        $this->issuu = $issuu;
+    }
+
+    public function getPublicationAssetsBySlug(string $slug, array $args = []):stdClass {
+        $args = wp_parse_args($args, [
+            'assetType' => '',
+            'size' => 10,
+            'page' => 1,
+            'documentPageNumber' => 0.0,
+        ]);
+        if (!$args['documentPageNumber']) unset($args['documentPageNumber']);
+
+        return $this->issuu->getResponse(method: 'GET', endpoint: "publications/{$slug}/assets", queryParameters: $args);
+    }
+
+    public function getPublicationEmbedBySlug(string $slug, array $args = []):stdClass {
+        $args = wp_parse_args($args, [
+            'responsive' => true,
+            'width' => '100%',
+            'height' => '100%',
+            'hideIssuuLogo' => false,
+            'hideShareButton' => false,
+            'showOtherPublications' => false,
+            'bgColor' => '',
+            'fullScreenShareBgColor' => '',
+        ]);
+
+        return $this->issuu->getResponse(method: 'GET', endpoint: "publications/{$slug}/embed", queryParameters: $args);
+    }
+
+}
diff --git a/includes/class-api.php b/includes/class-api.php
new file mode 100644
index 0000000..c1a36f8
--- /dev/null
+++ b/includes/class-api.php
@@ -0,0 +1,84 @@
+<?php
+/**
+ * @package CleverOgre
+ * @subpackage OgreIssuu
+ * @version 0.1.0
+ * @since 0.1.0
+ */
+
+namespace OgreIssuu;
+
+if (!defined('ABSPATH')) exit;
+
+use stdClass;
+use Exception;
+use lasselehtinen\Issuu\Issuu;
+use lasselehtinen\Issuu\Publications;
+use OgreIssuu\Api\Publications as ApiPublications;
+
+class Api {
+    use Singleton;
+
+    private Issuu $client;
+
+    public function __construct() {
+        if (!Settings::exists('token')) return;
+        $this->client = new Issuu(Settings::get('token'));
+    }
+
+    public function get_publications(array $args = []):stdClass {
+        if (!isset($this->client)) return null;
+
+        $args = wp_parse_args($args, [
+            'size' => 10,
+            'page' => 1,
+            'state' => 'ALL',
+            'q' => '',
+        ]);
+
+        $publications = new Publications($this->client);
+        try {
+            return $publications->list($args['size'], $args['page'], $args['state'], $args['q']);
+        } catch (Exception $e) {
+            error_log($e->getMessage());
+            return null;
+        }
+    }
+
+    public function get_publication(string $slug):stdClass {
+        if (!isset($this->client)) return null;
+
+        $publications = new Publications($this->client);
+        try {
+            return $publications->getPublicationBySlug($slug);
+        } catch (Exception $e) {
+            error_log($e->getMessage());
+            return null;
+        }
+    }
+
+    public function get_publication_assets(string $slug, array $args = []):stdClass {
+        if (!isset($this->client)) return null;
+
+        $publications = new ApiPublications($this->client);
+        try {
+            return $publications->getPublicationAssetsBySlug($slug, $args);
+        } catch (Exception $e) {
+            error_log($e->getMessage());
+            return null;
+        }
+    }
+
+    public function get_publication_embed(string $slug, array $args = []):stdClass {
+        if (!isset($this->client)) return null;
+
+        $publications = new ApiPublications($this->client);
+        try {
+            return $publications->getPublicationEmbedBySlug($slug, $args);
+        } catch (Exception $e) {
+            error_log($e->getMessage());
+            return null;
+        }
+    }
+
+}
diff --git a/ogre-issuu.php b/ogre-issuu.php
index 08964c6..d5dc2a2 100644
--- a/ogre-issuu.php
+++ b/ogre-issuu.php
@@ -34,7 +34,10 @@ class Plugin extends PluginBase {
         parent::__construct(__FILE__);
 
         $this->add_files([
+            'vendor/autoload.php',
             'includes/class-settings.php',
+            'includes/api/class-publications.php',
+            'includes/class-api.php',
         ]);
     }