diff --git a/config/routes.php b/config/routes.php
index 7fd5827..d94078a 100644
--- a/config/routes.php
+++ b/config/routes.php
@@ -77,6 +77,9 @@ static function (ResponseFactoryInterface $responseFactory, ValidatorInterface $
             Route::get('/events')
                 ->action([InspectController::class, 'eventListeners'])
                 ->name('events'),
+            Route::get('/session')
+                ->action([InspectController::class, 'session'])
+                ->name('session'),
             Route::get('/params')
                 ->action([InspectController::class, 'params'])
                 ->name('params'),
@@ -116,6 +119,9 @@ static function (ResponseFactoryInterface $responseFactory, ValidatorInterface $
             Route::post('/curl/build')
                 ->action([InspectController::class, 'buildCurl'])
                 ->name('curl/build'),
+            Route::get('/config/merge-plan')
+                ->action([\Yiisoft\Yii\Debug\Api\Controller\ConfigController::class, 'read'])
+                ->name('config/merge-plan'),
             Group::create('/git')
                 ->namePrefix('/git')
                 ->routes(
diff --git a/src/Controller/ConfigController.php b/src/Controller/ConfigController.php
new file mode 100644
index 0000000..cfe1407
--- /dev/null
+++ b/src/Controller/ConfigController.php
@@ -0,0 +1,48 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yiisoft\Yii\Debug\Api\Controller;
+
+use Exception;
+use Psr\Http\Message\ResponseInterface;
+use Yiisoft\Aliases\Aliases;
+use Yiisoft\DataResponse\DataResponseFactoryInterface;
+use Yiisoft\Yii\Debug\Api\Inspector\Command\BashCommand;
+
+final class ConfigController
+{
+    public function __construct(
+        private DataResponseFactoryInterface $responseFactory,
+    ) {
+    }
+
+    public function read(Aliases $aliases): ResponseInterface
+    {
+        $command = new BashCommand($aliases, [
+            'composer',
+            'yii-config-merge-plan',
+        ]);
+        $output = $command->run()->getResult();
+        $mergePlanPath = substr($output, 0, strpos($output, 'Xdebug: [Step Debug]') ?: -1);
+
+        if (!file_exists($mergePlanPath)) {
+            throw new Exception(
+                sprintf(
+                    'Could not find composer.json by the path "%s".',
+                    $mergePlanPath,
+                )
+            );
+        }
+
+        $content = require $mergePlanPath;
+        $rootAlias = $aliases->get('@root');
+
+        $result = [
+            'path' => substr($mergePlanPath, strlen($rootAlias) + 1),
+            'data' => $content,
+        ];
+
+        return $this->responseFactory->createResponse($result);
+    }
+}
diff --git a/src/Controller/InspectController.php b/src/Controller/InspectController.php
index 7e0b73b..58a31a5 100644
--- a/src/Controller/InspectController.php
+++ b/src/Controller/InspectController.php
@@ -26,6 +26,7 @@
 use Yiisoft\Router\CurrentRoute;
 use Yiisoft\Router\RouteCollectionInterface;
 use Yiisoft\Router\UrlMatcherInterface;
+use Yiisoft\Session\SessionInterface;
 use Yiisoft\Translator\CategorySource;
 use Yiisoft\VarDumper\VarDumper;
 use Yiisoft\Yii\Debug\Api\Inspector\ApplicationState;
@@ -402,6 +403,19 @@ public function eventListeners(ContainerInterface $container)
         ]);
     }
 
+    public function session(ContainerInterface $container): ResponseInterface
+    {
+        $session = $container->get(SessionInterface::class);
+        $data = $session->all();
+
+        return $this->responseFactory->createResponse([
+            'id' => $session->getId(),
+            'name' => $session->getName(),
+            'cookieParameters' => $session->getCookieParameters(),
+            'data' => $data,
+        ]);
+    }
+
     public function buildCurl(
         ServerRequestInterface $request,
         CollectorRepositoryInterface $collectorRepository