diff --git a/app/Http/Controllers/Api/V1/FileStorageController.php b/app/Http/Controllers/Api/V1/FileStorageController.php
index 1e26fac6..95e4e4d0 100644
--- a/app/Http/Controllers/Api/V1/FileStorageController.php
+++ b/app/Http/Controllers/Api/V1/FileStorageController.php
@@ -12,6 +12,20 @@
 
 class FileStorageController extends Controller
 {
+    /**
+     * Bearer 토큰 없이 X-TENANT-ID 헤더로 컨텍스트 설정 (MNG 프록시 호출용)
+     */
+    private function ensureContext(Request $request): void
+    {
+        if (! app()->bound('tenant_id') || ! app('tenant_id')) {
+            $tenantId = (int) ($request->header('X-TENANT-ID') ?: 287);
+            app()->instance('tenant_id', $tenantId);
+        }
+        if (! app()->bound('api_user') || ! app('api_user')) {
+            app()->instance('api_user', 1);
+        }
+    }
+
     /**
      * Upload file to temp
      */
@@ -85,8 +99,10 @@ public function trash()
     /**
      * Download file (attachment)
      */
-    public function download(int $id)
+    public function download(int $id, Request $request)
     {
+        $this->ensureContext($request);
+
         $service = new FileStorageService;
         $file = $service->getFile($id);
 
@@ -96,8 +112,10 @@ public function download(int $id)
     /**
      * View file inline (이미지/PDF 브라우저에서 바로 표시)
      */
-    public function view(int $id)
+    public function view(int $id, Request $request)
     {
+        $this->ensureContext($request);
+
         $service = new FileStorageService;
         $file = $service->getFile($id);
 
diff --git a/app/Http/Controllers/Api/V1/ItemsFileController.php b/app/Http/Controllers/Api/V1/ItemsFileController.php
index 7fd8f72e..71b319d0 100644
--- a/app/Http/Controllers/Api/V1/ItemsFileController.php
+++ b/app/Http/Controllers/Api/V1/ItemsFileController.php
@@ -26,6 +26,20 @@ class ItemsFileController extends Controller
      */
     private const ITEM_GROUP_ID = '1';
 
+    /**
+     * Bearer 토큰 없이 X-TENANT-ID 헤더로 컨텍스트 설정 (MNG 프록시 호출용)
+     */
+    private function ensureContext(Request $request): void
+    {
+        if (! app()->bound('tenant_id') || ! app('tenant_id')) {
+            $tenantId = (int) ($request->header('X-TENANT-ID') ?: 287);
+            app()->instance('tenant_id', $tenantId);
+        }
+        if (! app()->bound('api_user') || ! app('api_user')) {
+            app()->instance('api_user', 1);
+        }
+    }
+
     /**
      * 파일 목록 조회
      *
@@ -33,6 +47,7 @@ class ItemsFileController extends Controller
      */
     public function index(int $id, Request $request)
     {
+        $this->ensureContext($request);
         return ApiResponse::handle(function () use ($id, $request) {
             $tenantId = app('tenant_id');
             $fieldKey = $request->input('field_key');
@@ -69,6 +84,7 @@ public function index(int $id, Request $request)
      */
     public function upload(int $id, ItemFileUploadRequest $request)
     {
+        $this->ensureContext($request);
         return ApiResponse::handle(function () use ($id, $request) {
             $tenantId = app('tenant_id');
             $userId = auth()->id() ?? app('api_user');
@@ -152,6 +168,7 @@ public function upload(int $id, ItemFileUploadRequest $request)
      */
     public function delete(int $id, mixed $fileId, Request $request)
     {
+        $this->ensureContext($request);
         $fileId = (int) $fileId;
 
         return ApiResponse::handle(function () use ($id, $fileId) {