diff --git a/api.php b/api.php
index cda3c7b..a5ec289 100644
--- a/api.php
+++ b/api.php
@@ -901,6 +901,66 @@ if ( \S::get( 'action' ) == 'campaign_roas_history_get' )
   ] );
 }
 
+// Lista produktów filtrowana po custom_label_1 (źródło dla kampanii [PLA_CL1] Shopping)
+if ( \S::get( 'action' ) == 'products_get_by_cl1' )
+{
+  api_validate_api_key( $mdb );
+
+  $client_id_param = (int) \S::get( 'client_id' );
+  $cl1_value = trim( (string) \S::get( 'custom_label_1' ) );
+
+  if ( $client_id_param <= 0 )
+  {
+    api_json_response( [ 'result' => 'error', 'message' => 'Missing required param: client_id' ], 422 );
+  }
+
+  if ( $cl1_value === '' )
+  {
+    api_json_response( [ 'result' => 'error', 'message' => 'Missing required param: custom_label_1' ], 422 );
+  }
+
+  $rows = $mdb -> query(
+    'SELECT p.id, p.offer_id, p.name, p.title, p.google_product_category,
+            p.custom_label_1, p.custom_label_3, p.custom_label_4
+     FROM products p
+     WHERE p.client_id = :client_id
+       AND p.custom_label_1 = :cl1
+     ORDER BY p.offer_id',
+    [
+      ':client_id' => $client_id_param,
+      ':cl1' => $cl1_value
+    ]
+  ) -> fetchAll( \PDO::FETCH_ASSOC );
+
+  $products = [];
+  foreach ( $rows as $row )
+  {
+    $base_name = trim( (string) ( $row['name'] ?? '' ) );
+    $custom_title = trim( (string) ( $row['title'] ?? '' ) );
+    $title = $custom_title !== '' ? $custom_title : $base_name;
+    $google_category = trim( (string) ( $row['google_product_category'] ?? '' ) );
+
+    $products[] = [
+      'offer_id' => (string) ( $row['offer_id'] ?? '' ),
+      'title' => $title,
+      'default_name' => $base_name,
+      'custom_title' => $custom_title !== '' ? $custom_title : null,
+      'google_product_category' => $google_category !== '' ? $google_category : null,
+      'custom_label_1' => trim( (string) ( $row['custom_label_1'] ?? '' ) ),
+      'custom_label_3' => trim( (string) ( $row['custom_label_3'] ?? '' ) ),
+      'custom_label_4' => trim( (string) ( $row['custom_label_4'] ?? '' ) )
+    ];
+  }
+
+  api_json_response( [
+    'result' => 'ok',
+    'client_id' => $client_id_param,
+    'custom_label_1' => $cl1_value,
+    'count' => count( $products ),
+    'products' => $products
+  ] );
+}
+
 // Open Page Rank - zapis
 if ( \S::get( 'action' ) == 'domain_opr_save' )
 {