diff --git a/api/v1/index.php b/api/v1/index.php
index 10f6f00dac..fce4db8c4e 100644
--- a/api/v1/index.php
+++ b/api/v1/index.php
@@ -29,5 +29,4 @@
 
 require_once('../../bootstrap.php');
 
-$app = new \Espo\Core\Application();
-$app->runApi();
+(new \Espo\Core\Application())->run('api');
diff --git a/api/v1/portal-access/index.php b/api/v1/portal-access/index.php
index 0cd1872434..73519a2dd6 100644
--- a/api/v1/portal-access/index.php
+++ b/api/v1/portal-access/index.php
@@ -35,5 +35,4 @@ if (!empty($_GET['portalId'])) {
     $portalId = explode('/', $_SERVER['REQUEST_URI'])[count(explode('/', $_SERVER['SCRIPT_NAME'])) - 1];
 }
 
-$app = new \Espo\Core\Portal\Application($portalId);
-$app->runApi();
+(new \Espo\Core\Portal\Application($portalId))->run('api');
diff --git a/application/Espo/Core/Application.php b/application/Espo/Core/Application.php
index 17b3232a9d..7a14cadc68 100644
--- a/application/Espo/Core/Application.php
+++ b/application/Espo/Core/Application.php
@@ -29,22 +29,11 @@
 
 namespace Espo\Core;
 
-use Espo\Core\Exceptions\{
-    Error,
-};
-
 use Espo\Core\{
     ContainerConfiguration,
     InjectableFactory,
     Container,
     ApplicationUser,
-    Authentication\Authentication,
-    Api\Auth as ApiAuth,
-    Api\ErrorOutput as ApiErrorOutput,
-    Api\RequestWrapper,
-    Api\ResponseWrapper,
-    Api\RouteProcessor,
-    Utils\Route,
     Utils\Autoload,
     Utils\Config,
     Utils\Metadata,
@@ -57,17 +46,6 @@ use Espo\Core\{
     Loaders\Metadata as MetadataLoader,
 };
 
-use Psr\Http\{
-    Message\ResponseInterface as Response,
-    Message\ServerRequestInterface as Request,
-    Server\RequestHandlerInterface as RequestHandler,
-};
-
-use Slim\{
-    App as SlimApp,
-    Factory\AppFactory as SlimAppFactory,
-};
-
 use ReflectionClass;
 
 /**
@@ -77,10 +55,6 @@ class Application
 {
     protected $container;
 
-    protected $slim = null;
-
-    protected $log;
-
     protected $loaderClassNames = [
         'config' => ConfigLoader::class,
         'log' => LogLoader::class,
@@ -103,63 +77,6 @@ class Application
         $this->container = new Container(ContainerConfiguration::class, $this->loaderClassNames);
     }
 
-    /**
-     * Run REST API.
-     */
-    public function runApi()
-    {
-        $slim = $this->createSlimApp();
-        $slim->addRoutingMiddleware();
-
-        $crudList = array_keys($this->getConfig()->get('crud'));
-
-        $routeList = $this->getRouteList();
-
-        foreach ($routeList as $item) {
-            $method = strtolower($item['method']);
-            $route = $item['route'];
-
-            if (!in_array($method, $crudList) && $method !== 'options') {
-                $this->getLog()->error("Route: Method '{$method}' does not exist. Check the route '{$route}'.");
-                continue;
-            }
-
-            $slim->$method(
-                $route,
-                function (Request $request, Response $response, array $args) use ($item, $slim) {
-                    $requestWrapped = new RequestWrapper($request, $slim->getBasePath());
-                    $responseWrapped = new ResponseWrapper($response);
-
-                    try {
-                        $authRequired = !($item['noAuth'] ?? false);
-
-                        $apiAuth = new ApiAuth($this->createAuthentication(), $authRequired);
-                        $apiAuth->process($requestWrapped, $responseWrapped);
-
-                        if (!$apiAuth->isResolved()) {
-                            return $responseWrapped->getResponse();
-                        }
-                        if ($apiAuth->isResolvedUseNoAuth()) {
-                            $this->setupSystemUser();
-                        }
-
-                        $routeProcessor = $this->getInjectableFactory()->create(RouteProcessor::class);
-                        $routeProcessor->process($item['route'], $item['params'], $requestWrapped, $responseWrapped, $args);
-                    } catch (\Exception $exception) {
-                        (new ApiErrorOutput($requestWrapped))->process(
-                            $responseWrapped, $exception, false, $item, $args
-                        );
-                    }
-
-                    return $responseWrapped->getResponse();
-                }
-            );
-        }
-
-        $slim->addErrorMiddleware(false, true, true);
-        $slim->run();
-    }
-
     /**
      * Run an application through a specific runner.
      * You can find runner classes in `Espo\Core\ApplicationRunners`.
@@ -255,20 +172,6 @@ class Application
         return $this->container->get('config');
     }
 
-    protected function createSlimApp() : SlimApp
-    {
-        $slim = SlimAppFactory::create();
-        $slim->setBasePath(Route::detectBasePath());
-        return $slim;
-    }
-
-    protected function createAuthentication(bool $allowAnyAccess = false) : Authentication
-    {
-        return $this->getInjectableFactory()->createWith(Authentication::class, [
-            'allowAnyAccess' => $allowAnyAccess,
-        ]);
-    }
-
     protected function initAutoloads()
     {
         $autoload = $this->getInjectableFactory()->create(Autoload::class);
@@ -287,11 +190,6 @@ class Application
         }
     }
 
-    protected function getRouteList() : array
-    {
-        return $this->getInjectableFactory()->create(Route::class)->getFullList();
-    }
-
     /**
      * Set a base path of an index file related to the application directory. Used for a portal.
      */
diff --git a/application/Espo/Core/ApplicationRunners/Api.php b/application/Espo/Core/ApplicationRunners/Api.php
new file mode 100644
index 0000000000..a532536d23
--- /dev/null
+++ b/application/Espo/Core/ApplicationRunners/Api.php
@@ -0,0 +1,135 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2020 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\ApplicationRunners;
+
+use Espo\Core\Exceptions\Error;
+
+use Espo\Core\{
+    InjectableFactory,
+    ApplicationUser,
+    Authentication\Authentication,
+    Api\Auth as ApiAuth,
+    Api\ErrorOutput as ApiErrorOutput,
+    Api\RequestWrapper,
+    Api\ResponseWrapper,
+    Api\RouteProcessor,
+    Utils\Config,
+    Utils\Route,
+};
+
+use Slim\{
+    App as SlimApp,
+    Factory\AppFactory as SlimAppFactory,
+};
+
+use Psr\Http\{
+    Message\ResponseInterface as Psr7Response,
+    Message\ServerRequestInterface as Psr7Request,
+    Server\RequestHandlerInterface as Psr7RequestHandler,
+};
+
+use Exception;
+
+/**
+ * Runs API.
+ */
+class Api implements ApplicationRunner
+{
+    protected $injectableFactory;
+    protected $applicationUser;
+
+    public function __construct(InjectableFactory $injectableFactory, ApplicationUser $applicationUser, Config $config) {
+        $this->injectableFactory = $injectableFactory;
+        $this->applicationUser = $applicationUser;
+        $this->config = $config;
+    }
+
+    public function run()
+    {
+        $slim = SlimAppFactory::create();
+        $slim->setBasePath(Route::detectBasePath());
+        $slim->addRoutingMiddleware();
+
+        $crudList = array_keys($this->config->get('crud'));
+
+        $routeList = $this->getRouteList();
+
+        foreach ($routeList as $item) {
+            $method = strtolower($item['method']);
+            $route = $item['route'];
+
+            if (!in_array($method, $crudList) && $method !== 'options') {
+                $GLOBALS['log']->error("Route: Method '{$method}' does not exist. Check the route '{$route}'.");
+                continue;
+            }
+
+            $slim->$method(
+                $route,
+                function (Psr7Request $request, Psr7Response $response, array $args) use ($item, $slim) {
+                    $requestWrapped = new RequestWrapper($request, $slim->getBasePath());
+                    $responseWrapped = new ResponseWrapper($response);
+
+                    try {
+                        $authRequired = !($item['noAuth'] ?? false);
+
+                        $authentication = $this->injectableFactory->create(Authentication::class);
+
+                        $apiAuth = new ApiAuth($authentication, $authRequired);
+                        $apiAuth->process($requestWrapped, $responseWrapped);
+
+                        if (!$apiAuth->isResolved()) {
+                            return $responseWrapped->getResponse();
+                        }
+                        if ($apiAuth->isResolvedUseNoAuth()) {
+                            $this->applicationUser->setupSystemUser();
+                        }
+
+                        $routeProcessor = $this->injectableFactory->create(RouteProcessor::class);
+                        $routeProcessor->process($item['route'], $item['params'], $requestWrapped, $responseWrapped, $args);
+                    } catch (Exception $exception) {
+                        (new ApiErrorOutput($requestWrapped))->process(
+                            $responseWrapped, $exception, false, $item, $args
+                        );
+                    }
+
+                    return $responseWrapped->getResponse();
+                }
+            );
+        }
+
+        $slim->addErrorMiddleware(false, true, true);
+        $slim->run();
+    }
+
+    protected function getRouteList() : array
+    {
+        return $this->injectableFactory->create(Route::class)->getFullList();
+    }
+}
diff --git a/application/Espo/Core/Portal/Application.php b/application/Espo/Core/Portal/Application.php
index 33cbabaa6f..1a9fa235c5 100644
--- a/application/Espo/Core/Portal/Application.php
+++ b/application/Espo/Core/Portal/Application.php
@@ -94,22 +94,6 @@ class Application extends BaseApplication
         return $this->portal;
     }
 
-    protected function getRouteList() : array
-    {
-        $routeList = parent::getRouteList();
-
-        foreach ($routeList as $i => $route) {
-            if (isset($route['route'])) {
-                if ($route['route']{0} !== '/') {
-                    $route['route'] = '/' . $route['route'];
-                }
-                $route['route'] = '/{portalId}' . $route['route'];
-            }
-            $routeList[$i] = $route;
-        }
-        return $routeList;
-    }
-
     protected function getRunnerClassName(string $runnerName) : ?string
     {
         $className = 'Espo\\Core\\Portal\\ApplicationRunners\\' . ucfirst($runnerName);
diff --git a/application/Espo/Core/Portal/ApplicationRunners/Api.php b/application/Espo/Core/Portal/ApplicationRunners/Api.php
new file mode 100644
index 0000000000..5aa306291c
--- /dev/null
+++ b/application/Espo/Core/Portal/ApplicationRunners/Api.php
@@ -0,0 +1,53 @@
+<?php
+/************************************************************************
+ * This file is part of EspoCRM.
+ *
+ * EspoCRM - Open Source CRM application.
+ * Copyright (C) 2014-2020 Yuri Kuznetsov, Taras Machyshyn, Oleksiy Avramenko
+ * Website: https://www.espocrm.com
+ *
+ * EspoCRM is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * EspoCRM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with EspoCRM. If not, see http://www.gnu.org/licenses/.
+ *
+ * The interactive user interfaces in modified source and object code versions
+ * of this program must display Appropriate Legal Notices, as required under
+ * Section 5 of the GNU General Public License version 3.
+ *
+ * In accordance with Section 7(b) of the GNU General Public License version 3,
+ * these Appropriate Legal Notices must retain the display of the "EspoCRM" word.
+ ************************************************************************/
+
+namespace Espo\Core\Portal\ApplicationRunners;
+
+use Espo\Core\{
+    ApplicationRunners\Api as ApiBase,
+};
+
+class Api extends ApiBase
+{
+    protected function getRouteList() : array
+    {
+        $routeList = parent::getRouteList();
+
+        foreach ($routeList as $i => $route) {
+            if (isset($route['route'])) {
+                if ($route['route']{0} !== '/') {
+                    $route['route'] = '/' . $route['route'];
+                }
+                $route['route'] = '/{portalId}' . $route['route'];
+            }
+            $routeList[$i] = $route;
+        }
+        return $routeList;
+    }
+}