diff --git a/.htaccess b/.htaccess
index 2604d7a..5c2cb49 100644
--- a/.htaccess
+++ b/.htaccess
@@ -26,6 +26,7 @@ ErrorDocument 403 /errorpage/httperror.php
 ErrorDocument 404 /errorpage/httperror.php
 ErrorDocument 413 /errorpage/httperror.php
 ErrorDocument 500 /errorpage/httperror.php
+ErrorDocument 502 /errorpage/httperror.php
 ErrorDocument 503 /errorpage/httperror.php
 
 # --- セキュリティヘッダ ---
diff --git a/api/me/index.php b/api/me/index.php
index 33abb73..c6aad0a 100644
--- a/api/me/index.php
+++ b/api/me/index.php
@@ -58,7 +58,9 @@ if(isset($_GET['token']) || (!(empty($Get_Post_Json)))) {
                 $response = array(
                     'error_code' => "critical_error_userdata_not_found",
                 );
+                http_response_code(500);
             }else{
+                http_response_code(200);
                 $roles = explode(',', $userdata["role"]);
                 if(!(empty($roles))){
                     foreach ($roles as $roleId) {
@@ -87,7 +89,7 @@ if(isset($_GET['token']) || (!(empty($Get_Post_Json)))) {
                         $role[] = $roleinfo;
                     }
                 }else{
-                    $role[] = "";
+                    $role = [];
                 }
 
                 if(!(empty($userdata["sacinfo"]))){
diff --git a/api/token/get.php b/api/token/get.php
index 007209a..c73d2e1 100644
--- a/api/token/get.php
+++ b/api/token/get.php
@@ -98,7 +98,7 @@ if(isset($_GET['session']) || (!(empty($Get_Post_Json)))) {
         'error_code' => $err,
         'success' => false
     );
-    http_response_code(401);
+    http_response_code(400);
     echo json_encode($response, JSON_UNESCAPED_UNICODE);
 }
 ?>
diff --git a/api/users/index.php b/api/users/index.php
index 59bbba7..6f658d2 100644
--- a/api/users/index.php
+++ b/api/users/index.php
@@ -74,7 +74,9 @@ if(isset($_GET['token']) || (!(empty($Get_Post_Json)))) {
                 $response = array(
                     'error_code' => "critical_error_userdata_not_found",
                 );
+                http_response_code(400);
             }else{
+                http_response_code(200);
                 $roles = explode(',', $userdata["role"]);
                 if(!(empty($roles))){
                     foreach ($roles as $roleId) {
@@ -103,7 +105,7 @@ if(isset($_GET['token']) || (!(empty($Get_Post_Json)))) {
                         $role[] = $roleinfo;
                     }
                 }else{
-                    $role[] = "";
+                    $role = [];
                 }
 
                 if(!(empty($userdata["sacinfo"]))){
diff --git a/errorpage/serverstop.json b/errorpage/serverstop.json
new file mode 100644
index 0000000..c6f15cf
--- /dev/null
+++ b/errorpage/serverstop.json
@@ -0,0 +1,4 @@
+{
+  "success": false,
+  "error_code": "server_down"
+}
diff --git a/settings_admin/maintenance_admin.php b/settings_admin/maintenance_admin.php
index bda0a32..9901130 100644
--- a/settings_admin/maintenance_admin.php
+++ b/settings_admin/maintenance_admin.php
@@ -143,8 +143,12 @@ if( !empty($_POST['serverstop_btn_submit']) ) {
 
     // htaccess用意
 	$htaccess = "
-ErrorDocument 403 /errorpage/serverstop.php
 RewriteEngine On
+
+RewriteCond %{REQUEST_URI} ^/api/.*$
+RewriteRule ^.*$ /errorpage/serverstop.json [R=500,L]
+
+ErrorDocument 403 /errorpage/serverstop.php
 RewriteCond %{REQUEST_URI} !=/function/function.php
 RewriteCond %{REQUEST_URI} !=/errorpage/serverstop.php
 RewriteCond %{REQUEST_URI} !=/css/home.css
@@ -244,4 +248,4 @@ require('../logout/logout.php');
             }
         });
     });
-</script>
\ No newline at end of file
+</script>