diff --git a/README.md b/README.md
index 574f310..4c24e10 100644
--- a/README.md
+++ b/README.md
@@ -55,6 +55,8 @@ The creation API will return the task object:
   "total_size": 0,
   "largest_file": null,
   "largest_file_size": null,
+  "is_downloading": False,
+  "current_progessing_stage": "waiting_assign",
   "done": false,
   "failed": false,
   "recoverable": false,
diff --git a/task/models.py b/task/models.py
index ea13f93..34dd947 100644
--- a/task/models.py
+++ b/task/models.py
@@ -286,14 +286,17 @@ def get_current_step(self):
                 return name
 
     @property
-    def current_step(self):
+    def current_progressing_stage(self) -> str:
         return self.get_current_step()
 
     @property
-    def is_downloading(self):
-        return self.current_step == "downloading_files"
+    def is_downloading(self) -> bool:
+        return self.current_progressing_stage in [
+            "downloading_files",
+            "downloading_samplings",
+        ]
 
-    def get_resume_method_name(self):
+    def get_resume_method_name(self) -> str:
         resume_methods = {
             "waiting_assign": "restart",
             "transferring": "restart",
@@ -304,11 +307,11 @@ def get_resume_method_name(self):
         if step_name:
             return resume_methods[step_name]
 
-    def inc_retry_times(self):
+    def inc_retry_times(self) -> None:
         self.retry_times += 1
         self.save()
 
-    def schedule_resume(self):
+    def schedule_resume(self) -> None:
         if not self.failed:
             return
         method_name = self.get_resume_method_name()
@@ -317,12 +320,12 @@ def schedule_resume(self):
             method()
 
     @classmethod
-    def schedule_resume_failed(cls):
+    def schedule_resume_failed(cls) -> None:
         for task in cls.filter_failed():
             task.schedule_resume()
 
     @property
-    def done(self):
+    def done(self) -> bool:
         if self.failed:
             return False
         if not self.full_downloaded_at:
@@ -332,7 +335,7 @@ def done(self):
         return True
 
     @property
-    def recoverable(self):
+    def recoverable(self) -> bool:
         if not self.failed:
             return False
 
diff --git a/task/serializers.py b/task/serializers.py
index 11d4629..b918a7c 100644
--- a/task/serializers.py
+++ b/task/serializers.py
@@ -29,6 +29,8 @@ class Meta:
             "total_size",
             "largest_file",
             "largest_file_size",
+            "is_downloading",
+            "current_progressing_stage",
             "done",
             "failed",
             "recoverable",
diff --git a/task/tests/test_api.py b/task/tests/test_api.py
index 794aa18..b17fc10 100644
--- a/task/tests/test_api.py
+++ b/task/tests/test_api.py
@@ -68,7 +68,42 @@ def test_create_task(self):
 
         self.assertEqual(response.status_code, status.HTTP_201_CREATED)
         self.assertEqual(Task.objects.count(), 2)
-        assert response.json()["full_download_now"] is False
+        data = response.json()
+        assert data["full_download_now"] is False
+        assert data["current_progressing_stage"] == "waiting_assign"
+        assert data["is_downloading"] is False
+        assert set(data.keys()) == {
+            "callback",
+            "captcha_required",
+            "captcha_url",
+            "captcha",
+            "created_at",
+            "current_progressing_stage",
+            "done",
+            "failed",
+            "file_listed_at",
+            "finished_at",
+            "full_download_now",
+            "full_downloaded_at",
+            "id",
+            "is_downloading",
+            "largest_file_size",
+            "largest_file",
+            "message",
+            "path",
+            "recoverable",
+            "retry_times",
+            "sample_downloaded_at",
+            "sample_path",
+            "shared_id",
+            "shared_link",
+            "shared_password",
+            "started_at",
+            "status",
+            "total_files",
+            "total_size",
+            "transfer_completed_at",
+        }
 
     def test_create_task_full_download_now(self):
         url = reverse("task-list")