diff --git a/app/code/Magento/UrlRewriteGraphQl/Model/Resolver/UrlRewrite/CustomUrlLocatorInterface.php b/app/code/Magento/UrlRewriteGraphQl/Model/Resolver/UrlRewrite/CustomUrlLocatorInterface.php
index df0c0ee96c16c..0a6c02e561670 100644
--- a/app/code/Magento/UrlRewriteGraphQl/Model/Resolver/UrlRewrite/CustomUrlLocatorInterface.php
+++ b/app/code/Magento/UrlRewriteGraphQl/Model/Resolver/UrlRewrite/CustomUrlLocatorInterface.php
@@ -11,6 +11,8 @@
  * Interface for resolution of custom URLs.
  *
  * It can be used, for example, to resolve '\' URL path to a 'Home' page.
+ *
+ * @api
  */
 interface CustomUrlLocatorInterface
 {
diff --git a/app/code/Magento/User/Model/Spi/NotificationExceptionInterface.php b/app/code/Magento/User/Model/Spi/NotificationExceptionInterface.php
index 47af7cbe6dd50..722a9585952c5 100644
--- a/app/code/Magento/User/Model/Spi/NotificationExceptionInterface.php
+++ b/app/code/Magento/User/Model/Spi/NotificationExceptionInterface.php
@@ -10,6 +10,8 @@
 
 /**
  * When a notification cannot be sent.
+ *
+ * @api
  */
 interface NotificationExceptionInterface extends \Throwable
 {
diff --git a/app/code/Magento/User/Model/Spi/NotificatorInterface.php b/app/code/Magento/User/Model/Spi/NotificatorInterface.php
index f5e8ee68e7eed..1277a4ca7084c 100644
--- a/app/code/Magento/User/Model/Spi/NotificatorInterface.php
+++ b/app/code/Magento/User/Model/Spi/NotificatorInterface.php
@@ -12,6 +12,8 @@
 
 /**
  * Use to send out notifications about user related events.
+ *
+ * @api
  */
 interface NotificatorInterface
 {
diff --git a/app/code/Magento/Vault/Block/Customer/IconInterface.php b/app/code/Magento/Vault/Block/Customer/IconInterface.php
index d4bcb4e55f71c..7625995a36601 100644
--- a/app/code/Magento/Vault/Block/Customer/IconInterface.php
+++ b/app/code/Magento/Vault/Block/Customer/IconInterface.php
@@ -7,6 +7,8 @@
 
 /**
  * Interface IconInterface
+ *
+ * @api
  */
 interface IconInterface
 {
diff --git a/app/code/Magento/Webapi/Controller/Rest/RequestProcessorInterface.php b/app/code/Magento/Webapi/Controller/Rest/RequestProcessorInterface.php
index f4340c18e2134..5e021ecdc02dd 100644
--- a/app/code/Magento/Webapi/Controller/Rest/RequestProcessorInterface.php
+++ b/app/code/Magento/Webapi/Controller/Rest/RequestProcessorInterface.php
@@ -9,6 +9,8 @@
 
 /**
  *  Request processor interface
+ *
+ * @api
  */
 interface RequestProcessorInterface
 {
diff --git a/app/code/Magento/Widget/Block/BlockInterface.php b/app/code/Magento/Widget/Block/BlockInterface.php
index 4f795d949b8cd..eff9a0b26b528 100644
--- a/app/code/Magento/Widget/Block/BlockInterface.php
+++ b/app/code/Magento/Widget/Block/BlockInterface.php
@@ -14,6 +14,7 @@
 /**
  * Interface \Magento\Widget\Block\BlockInterface
  *
+ * @api
  */
 interface BlockInterface
 {
diff --git a/app/code/Magento/Wishlist/Controller/IndexInterface.php b/app/code/Magento/Wishlist/Controller/IndexInterface.php
index 8954996ab1173..1e2bcb66a7830 100644
--- a/app/code/Magento/Wishlist/Controller/IndexInterface.php
+++ b/app/code/Magento/Wishlist/Controller/IndexInterface.php
@@ -11,6 +11,7 @@
 /**
  * Interface \Magento\Wishlist\Controller\IndexInterface
  *
+ * @api
  */
 interface IndexInterface extends \Magento\Framework\App\ActionInterface, ViewInterface
 {
diff --git a/app/code/Magento/Wishlist/Controller/WishlistProviderInterface.php b/app/code/Magento/Wishlist/Controller/WishlistProviderInterface.php
index 0b74c0a01a36d..08f16471a117b 100644
--- a/app/code/Magento/Wishlist/Controller/WishlistProviderInterface.php
+++ b/app/code/Magento/Wishlist/Controller/WishlistProviderInterface.php
@@ -9,6 +9,7 @@
 /**
  * Interface \Magento\Wishlist\Controller\WishlistProviderInterface
  *
+ * @api
  */
 interface WishlistProviderInterface
 {
diff --git a/app/code/Magento/Wishlist/Model/AuthenticationStateInterface.php b/app/code/Magento/Wishlist/Model/AuthenticationStateInterface.php
index 2c93097d1c3e1..5c7e9c808ff0f 100644
--- a/app/code/Magento/Wishlist/Model/AuthenticationStateInterface.php
+++ b/app/code/Magento/Wishlist/Model/AuthenticationStateInterface.php
@@ -9,6 +9,7 @@
 /**
  * Interface \Magento\Wishlist\Model\AuthenticationStateInterface
  *
+ * @api
  */
 interface AuthenticationStateInterface
 {
diff --git a/app/code/Magento/Wishlist/Model/ResourceModel/Item/Product/CollectionBuilderInterface.php b/app/code/Magento/Wishlist/Model/ResourceModel/Item/Product/CollectionBuilderInterface.php
index 1984d92e08a60..570afaeb6a002 100644
--- a/app/code/Magento/Wishlist/Model/ResourceModel/Item/Product/CollectionBuilderInterface.php
+++ b/app/code/Magento/Wishlist/Model/ResourceModel/Item/Product/CollectionBuilderInterface.php
@@ -12,6 +12,8 @@
 
 /**
  * Wishlist items products collection builder
+ *
+ * @api
  */
 interface CollectionBuilderInterface
 {
diff --git a/app/code/Magento/Wishlist/Model/Wishlist/BuyRequest/BuyRequestDataProviderInterface.php b/app/code/Magento/Wishlist/Model/Wishlist/BuyRequest/BuyRequestDataProviderInterface.php
index fac45d7f86c7c..63c2afc19dd3d 100644
--- a/app/code/Magento/Wishlist/Model/Wishlist/BuyRequest/BuyRequestDataProviderInterface.php
+++ b/app/code/Magento/Wishlist/Model/Wishlist/BuyRequest/BuyRequestDataProviderInterface.php
@@ -11,6 +11,8 @@
 
 /**
  * Build buy request for adding products to wishlist
+ *
+ * @api
  */
 interface BuyRequestDataProviderInterface
 {
diff --git a/app/code/Magento/Wishlist/Model/Wishlist/Data/WishlistItem.php b/app/code/Magento/Wishlist/Model/Wishlist/Data/WishlistItem.php
index 236b7f1eee72d..d5c974c733225 100644
--- a/app/code/Magento/Wishlist/Model/Wishlist/Data/WishlistItem.php
+++ b/app/code/Magento/Wishlist/Model/Wishlist/Data/WishlistItem.php
@@ -9,6 +9,8 @@
 
 /**
  * DTO represents Wishlist Item data
+ *
+ * @api
  */
 class WishlistItem
 {
diff --git a/lib/internal/Magento/Framework/Webapi/Rest/Request.php b/lib/internal/Magento/Framework/Webapi/Rest/Request.php
index 78ed1b663c7ff..9b2313b593eea 100644
--- a/lib/internal/Magento/Framework/Webapi/Rest/Request.php
+++ b/lib/internal/Magento/Framework/Webapi/Rest/Request.php
@@ -11,6 +11,11 @@
 use Magento\Framework\Api\SimpleDataObjectConverter;
 use Magento\Framework\Phrase;
 
+/**
+ * Class Request
+ *
+ * @api
+ */
 class Request extends \Magento\Framework\Webapi\Request
 {
     /**#@+