diff --git a/lib/internal/Magento/Framework/Profiler/Driver/Standard/OutputInterface.php b/lib/internal/Magento/Framework/Profiler/Driver/Standard/OutputInterface.php
index 6e5c30ca7b867..746d2ac8ddafd 100644
--- a/lib/internal/Magento/Framework/Profiler/Driver/Standard/OutputInterface.php
+++ b/lib/internal/Magento/Framework/Profiler/Driver/Standard/OutputInterface.php
@@ -5,11 +5,14 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Profiler\Driver\Standard;
 
 /**
  * Interface \Magento\Framework\Profiler\Driver\Standard\OutputInterface
  *
+ * @api
  */
 interface OutputInterface
 {
diff --git a/lib/internal/Magento/Framework/Profiler/Driver/Standard/Stat.php b/lib/internal/Magento/Framework/Profiler/Driver/Standard/Stat.php
index 9774bef8cb513..cb9484c24c10e 100644
--- a/lib/internal/Magento/Framework/Profiler/Driver/Standard/Stat.php
+++ b/lib/internal/Magento/Framework/Profiler/Driver/Standard/Stat.php
@@ -5,10 +5,15 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Profiler\Driver\Standard;
 
 use Magento\Framework\Profiler;
 
+/**
+ * @api
+ */
 class Stat
 {
     /**
diff --git a/lib/internal/Magento/Framework/Search/Adapter/Aggregation/AggregationResolverInterface.php b/lib/internal/Magento/Framework/Search/Adapter/Aggregation/AggregationResolverInterface.php
index 28ca786d537b0..a5e3690dfdea5 100644
--- a/lib/internal/Magento/Framework/Search/Adapter/Aggregation/AggregationResolverInterface.php
+++ b/lib/internal/Magento/Framework/Search/Adapter/Aggregation/AggregationResolverInterface.php
@@ -3,6 +3,8 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Search\Adapter\Aggregation;
 
 use Magento\Framework\Search\RequestInterface;
@@ -10,6 +12,7 @@
 /**
  * Interface \Magento\Framework\Search\Adapter\Aggregation\AggregationResolverInterface
  *
+ * @api
  */
 interface AggregationResolverInterface
 {
diff --git a/lib/internal/Magento/Framework/Search/Adapter/OptionsInterface.php b/lib/internal/Magento/Framework/Search/Adapter/OptionsInterface.php
index f91af9bb12a2c..f39863e469624 100644
--- a/lib/internal/Magento/Framework/Search/Adapter/OptionsInterface.php
+++ b/lib/internal/Magento/Framework/Search/Adapter/OptionsInterface.php
@@ -3,11 +3,14 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Search\Adapter;
 
 /**
  * Interface \Magento\Framework\Search\Adapter\OptionsInterface
  *
+ * @api
  */
 interface OptionsInterface
 {
diff --git a/lib/internal/Magento/Framework/Search/Adapter/Preprocessor/PreprocessorInterface.php b/lib/internal/Magento/Framework/Search/Adapter/Preprocessor/PreprocessorInterface.php
index 2109ce9416840..1834974399c45 100644
--- a/lib/internal/Magento/Framework/Search/Adapter/Preprocessor/PreprocessorInterface.php
+++ b/lib/internal/Magento/Framework/Search/Adapter/Preprocessor/PreprocessorInterface.php
@@ -3,11 +3,14 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Search\Adapter\Preprocessor;
 
 /**
  * Interface \Magento\Framework\Search\Adapter\Preprocessor\PreprocessorInterface
  *
+ * @api
  */
 interface PreprocessorInterface
 {
diff --git a/lib/internal/Magento/Framework/Search/AdapterInterface.php b/lib/internal/Magento/Framework/Search/AdapterInterface.php
index 38faac4cb095b..326358bdeef0f 100644
--- a/lib/internal/Magento/Framework/Search/AdapterInterface.php
+++ b/lib/internal/Magento/Framework/Search/AdapterInterface.php
@@ -3,12 +3,16 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Search;
 
 use Magento\Framework\Search\Response\QueryResponse;
 
 /**
  * Search Adapter interface
+ *
+ * @api
  */
 interface AdapterInterface
 {
diff --git a/lib/internal/Magento/Framework/Search/Dynamic/Algorithm/AlgorithmInterface.php b/lib/internal/Magento/Framework/Search/Dynamic/Algorithm/AlgorithmInterface.php
index 574c4a65b939d..57590aae5d789 100644
--- a/lib/internal/Magento/Framework/Search/Dynamic/Algorithm/AlgorithmInterface.php
+++ b/lib/internal/Magento/Framework/Search/Dynamic/Algorithm/AlgorithmInterface.php
@@ -3,6 +3,8 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Search\Dynamic\Algorithm;
 
 use Magento\Framework\DB\Ddl\Table;
@@ -12,6 +14,7 @@
 /**
  * Interface \Magento\Framework\Search\Dynamic\Algorithm\AlgorithmInterface
  *
+ * @api
  */
 interface AlgorithmInterface
 {
diff --git a/lib/internal/Magento/Framework/Search/Request/Aggregation/StatusInterface.php b/lib/internal/Magento/Framework/Search/Request/Aggregation/StatusInterface.php
index 29fbb5fc810a6..b02b92da24026 100644
--- a/lib/internal/Magento/Framework/Search/Request/Aggregation/StatusInterface.php
+++ b/lib/internal/Magento/Framework/Search/Request/Aggregation/StatusInterface.php
@@ -4,11 +4,14 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Search\Request\Aggregation;
 
 /**
  * Interface \Magento\Framework\Search\Request\Aggregation\StatusInterface
  *
+ * @api
  */
 interface StatusInterface
 {
diff --git a/lib/internal/Magento/Framework/Search/Request/IndexScopeResolverInterface.php b/lib/internal/Magento/Framework/Search/Request/IndexScopeResolverInterface.php
index 9e907883bb2b9..77ca1b7975afb 100644
--- a/lib/internal/Magento/Framework/Search/Request/IndexScopeResolverInterface.php
+++ b/lib/internal/Magento/Framework/Search/Request/IndexScopeResolverInterface.php
@@ -3,11 +3,15 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Search\Request;
 
 /**
  * Resolve table name by provided dimensions. Scope Resolver must accept all dimensions that potentially can be used to
  * resolve table name, but certain implementation can filter them if needed
+ *
+ * @api
  */
 interface IndexScopeResolverInterface
 {
diff --git a/lib/internal/Magento/Framework/Search/ResponseInterface.php b/lib/internal/Magento/Framework/Search/ResponseInterface.php
index 3b89528532602..75e1c4e80feb6 100644
--- a/lib/internal/Magento/Framework/Search/ResponseInterface.php
+++ b/lib/internal/Magento/Framework/Search/ResponseInterface.php
@@ -3,10 +3,14 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Search;
 
 /**
  * Search Request
+ *
+ * @api
  */
 interface ResponseInterface extends \IteratorAggregate, \Countable
 {
diff --git a/lib/internal/Magento/Framework/Search/SearchEngine/ConfigInterface.php b/lib/internal/Magento/Framework/Search/SearchEngine/ConfigInterface.php
index a060c12503cb2..eb619fd3bc7ca 100644
--- a/lib/internal/Magento/Framework/Search/SearchEngine/ConfigInterface.php
+++ b/lib/internal/Magento/Framework/Search/SearchEngine/ConfigInterface.php
@@ -3,11 +3,14 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Search\SearchEngine;
 
 /**
  * Interface \Magento\Framework\Search\SearchEngine\ConfigInterface
  *
+ * @api
  */
 interface ConfigInterface
 {
diff --git a/lib/internal/Magento/Framework/Search/SearchEngineInterface.php b/lib/internal/Magento/Framework/Search/SearchEngineInterface.php
index ecd7a1e0818dc..fd219ba65b469 100644
--- a/lib/internal/Magento/Framework/Search/SearchEngineInterface.php
+++ b/lib/internal/Magento/Framework/Search/SearchEngineInterface.php
@@ -3,10 +3,14 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Search;
 
 /**
  * Search Engine interface
+ *
+ * @api
  */
 interface SearchEngineInterface
 {
diff --git a/lib/internal/Magento/Framework/Session/Config/ConfigInterface.php b/lib/internal/Magento/Framework/Session/Config/ConfigInterface.php
index 8d3154e9a3b41..aed0fded37e18 100644
--- a/lib/internal/Magento/Framework/Session/Config/ConfigInterface.php
+++ b/lib/internal/Magento/Framework/Session/Config/ConfigInterface.php
@@ -12,6 +12,7 @@
 /**
  * Interface \Magento\Framework\Session\Config\ConfigInterface
  *
+ * @api
  */
 interface ConfigInterface
 {
diff --git a/lib/internal/Magento/Framework/Session/SaveHandlerInterface.php b/lib/internal/Magento/Framework/Session/SaveHandlerInterface.php
index 0286847c547fe..5f8e34a1e9155 100644
--- a/lib/internal/Magento/Framework/Session/SaveHandlerInterface.php
+++ b/lib/internal/Magento/Framework/Session/SaveHandlerInterface.php
@@ -5,11 +5,14 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Session;
 
 /**
  * Interface \Magento\Framework\Session\SaveHandlerInterface
  *
+ * @api
  */
 interface SaveHandlerInterface extends \SessionHandlerInterface
 {
diff --git a/lib/internal/Magento/Framework/Session/StorageInterface.php b/lib/internal/Magento/Framework/Session/StorageInterface.php
index 1bd705848d654..03ce7a6fdb0f6 100644
--- a/lib/internal/Magento/Framework/Session/StorageInterface.php
+++ b/lib/internal/Magento/Framework/Session/StorageInterface.php
@@ -5,11 +5,14 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Session;
 
 /**
  * Interface \Magento\Framework\Session\StorageInterface
  *
+ * @api
  */
 interface StorageInterface
 {
diff --git a/lib/internal/Magento/Framework/Session/ValidatorInterface.php b/lib/internal/Magento/Framework/Session/ValidatorInterface.php
index 56f11633a5b81..98d5c25be6197 100644
--- a/lib/internal/Magento/Framework/Session/ValidatorInterface.php
+++ b/lib/internal/Magento/Framework/Session/ValidatorInterface.php
@@ -5,10 +5,14 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
+
 namespace Magento\Framework\Session;
 
 /**
  * Session validator interface
+ *
+ * @api
  */
 interface ValidatorInterface
 {