diff --git a/htdocs/product/class/api_products.class.php b/htdocs/product/class/api_products.class.php
index 2f2d24f7458..f66ba06ac27 100644
--- a/htdocs/product/class/api_products.class.php
+++ b/htdocs/product/class/api_products.class.php
@@ -165,9 +165,10 @@ class Products extends DolibarrApi
 	 * @param  int    $mode       Use this param to filter list (0 for all, 1 for only product, 2 for only service)
 	 * @param  int    $category   Use this param to filter list by category
 	 * @param  string $sqlfilters Other criteria to filter answers separated by a comma. Syntax example "(t.tobuy:=:0) and (t.tosell:=:1)"
+	 * @param  bool   $ids_only   Return only IDs of product instead of all properties (faster, above all if list is long)
 	 * @return array                Array of product objects
 	 */
-	public function index($sortfield = "t.ref", $sortorder = 'ASC', $limit = 100, $page = 0, $mode = 0, $category = 0, $sqlfilters = '')
+	public function index($sortfield = "t.ref", $sortorder = 'ASC', $limit = 100, $page = 0, $mode = 0, $category = 0, $sqlfilters = '', $ids_only = false)
 	{
 		global $db, $conf;
 
@@ -219,9 +220,13 @@ class Products extends DolibarrApi
 			$i = 0;
 			while ($i < $min) {
 				$obj = $this->db->fetch_object($result);
-				$product_static = new Product($this->db);
-				if ($product_static->fetch($obj->rowid)) {
-					$obj_ret[] = $this->_cleanObjectDatas($product_static);
+				if (!$ids_only) {
+					$product_static = new Product($this->db);
+					if ($product_static->fetch($obj->rowid)) {
+						$obj_ret[] = $this->_cleanObjectDatas($product_static);
+					}
+				} else {
+					$obj_ret[] = $obj->rowid;
 				}
 				$i++;
 			}
@@ -1866,6 +1871,9 @@ class Products extends DolibarrApi
 			}
 		}
 
+		// product is used
+		$this->product->is_object_used = $this->product->isObjectUsed() > 0;
+
 		return $this->_cleanObjectDatas($this->product);
 	}
 }