diff --git a/matweb/oas/bulk.yml b/matweb/oas/bulk.yml
new file mode 100644
index 0000000..f91573f
--- /dev/null
+++ b/matweb/oas/bulk.yml
@@ -0,0 +1,48 @@
+---
+tags:
+  - "File Bulk Download"
+summary: 'Group multiple files to download as one zip archive'
+consumes:
+  - "application/json"
+produces:
+  - "application/json"
+parameters:
+- in: "body"
+  name: "body"
+  description: "The files that will be combined for one single download"
+  required: true
+  schema:
+    $ref: '#/definitions/BulkBody'
+
+responses:
+  201:
+    description: "A new resource to download all files as one archive"
+    schema:
+      $ref: '#/definitions/UploadResponse'
+  400:
+    description: "Invalid input"
+    schema:
+      $ref: '#/definitions/ErrorResponse'
+  500:
+    description: "Unable to clean the file"
+    schema:
+      $ref: '#/definitions/ErrorResponse'
+
+definitions:
+  BulkBody:
+    type: "object"
+    properties:
+      download_list:
+        type: "array"
+        description: "An object containing the files you want to create a bulk download for"
+        items:
+          $ref: '#/definitions/BulkFile'
+  BulkFile:
+    type: "object"
+    properties:
+      file_name:
+        type: "string"
+      key:
+        type: "string"
+      secret:
+        type: "string"
\ No newline at end of file
diff --git a/matweb/oas/upload.yml b/matweb/oas/upload.yml
index c7a9bd7..71cb87b 100644
--- a/matweb/oas/upload.yml
+++ b/matweb/oas/upload.yml
@@ -22,7 +22,7 @@ parameters:
         example: 'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+M9QDwADhgGAWjR9awAAAABJRU5ErkJggg=='
 
 responses:
-  200:
+  201:
     description: "An object containing all info about the cleaned file"
     schema:
       $ref: '#/definitions/UploadResponse'
diff --git a/matweb/rest_api.py b/matweb/rest_api.py
index 0e47a5d..2bf44f0 100644
--- a/matweb/rest_api.py
+++ b/matweb/rest_api.py
@@ -64,7 +64,7 @@ class APIUpload(Resource):
                 filename=output_filename,
                 _external=True
             )
-        )
+        ), 201
 
 
 class APIDownload(Resource):
@@ -110,6 +110,7 @@ class APIBulkDownloadCreator(Resource):
     }
     v = Validator(schema)
 
+    @swag_from('./oas/bulk.yml')
     def post(self):
         utils.check_upload_folder(self.upload_folder)
         data = request.json