Merge magento-partners/magento2ce#10.

Author: Volodymyr Kublytskyi

app/code/Magento/Swagger/Block/Index.php

@@ -0,0 +1,32 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+namespace Magento\Swagger\Block;
+
+use Magento\Framework\View\Element\Template;
+
+/**
+ * Class Index
+ *
+ * @package Magento\Swagger\Block
+ */
+class Index extends Template
+{
+    /**
+     * @return mixed|string
+     */
+    private function getParamStore()
+    {
+        return ($this->getRequest()->getParam('store')) ? $this->getRequest()->getParam('store') : 'all';
+    }
+
+    /**
+     * @return string
+     */
+    public function getSchemaUrl()
+    {
+        return rtrim($this->getBaseUrl(), '/') . '/rest/' . $this->getParamStore() . '/schema?services=all';
+    }
+}

app/code/Magento/Swagger/view/frontend/layout/swagger_index_index.xml

@@ -45,7 +45,7 @@
         <referenceContainer name="page.wrapper" remove="true"/>
         <referenceBlock name="requirejs-config" remove="true"/>
         <referenceContainer name="root">
-            <block name="swaggerUiContent" class="Magento\Framework\View\Element\Template" template="Magento_Swagger::swagger-ui/index.phtml"/>
+            <block name="swaggerUiContent" class="Magento\Swagger\Block\Index" template="Magento_Swagger::swagger-ui/index.phtml"/>
         </referenceContainer>
     </body>
 </page>

app/code/Magento/Swagger/view/frontend/templates/swagger-ui/index.phtml

@@ -14,7 +14,7 @@
 
 /** @var \Magento\Framework\View\Element\Template $block */
 
-$schemaUrl = rtrim($block->getBaseUrl(), '/') . '/rest/all/schema?services=all';
+$schemaUrl = $block->getSchemaUrl();
 ?>
 
 <div id='header'>