diff --git a/lms/djangoapps/discussion/django_comment_client/base/tests.py b/lms/djangoapps/discussion/django_comment_client/base/tests.py
index 4f7de85547..1fe5522d38 100644
--- a/lms/djangoapps/discussion/django_comment_client/base/tests.py
+++ b/lms/djangoapps/discussion/django_comment_client/base/tests.py
@@ -269,7 +269,9 @@ class ViewsTestCaseMixin:
         data = {
             "user_id": str(self.student.id),
             "closed": False,
-            "commentable_id": "non_team_dummy_id"
+            "commentable_id": "non_team_dummy_id",
+            "thread_id": "dummy",
+            "thread_type": "discussion"
         }
         if include_depth:
             data["depth"] = 0
@@ -1141,7 +1143,7 @@ class ViewPermissionsTestCase(ForumsEnableMixin, UrlResetMixin, SharedModuleStor
     def test_endorse_response_as_staff(self, mock_request):
         self._set_mock_request_thread_and_comment(
             mock_request,
-            {"type": "thread", "thread_type": "question", "user_id": str(self.student.id)},
+            {"type": "thread", "thread_type": "question", "user_id": str(self.student.id), "commentable_id": "course"},
             {"type": "comment", "thread_id": "dummy"}
         )
         self.client.login(username=self.moderator.username, password=self.password)
@@ -1153,7 +1155,8 @@ class ViewPermissionsTestCase(ForumsEnableMixin, UrlResetMixin, SharedModuleStor
     def test_endorse_response_as_student(self, mock_request):
         self._set_mock_request_thread_and_comment(
             mock_request,
-            {"type": "thread", "thread_type": "question", "user_id": str(self.moderator.id)},
+            {"type": "thread", "thread_type": "question",
+             "user_id": str(self.moderator.id), "commentable_id": "course"},
             {"type": "comment", "thread_id": "dummy"}
         )
         self.client.login(username=self.student.username, password=self.password)
@@ -1165,7 +1168,7 @@ class ViewPermissionsTestCase(ForumsEnableMixin, UrlResetMixin, SharedModuleStor
     def test_endorse_response_as_student_question_author(self, mock_request):
         self._set_mock_request_thread_and_comment(
             mock_request,
-            {"type": "thread", "thread_type": "question", "user_id": str(self.student.id)},
+            {"type": "thread", "thread_type": "question", "user_id": str(self.student.id), "commentable_id": "course"},
             {"type": "comment", "thread_id": "dummy"}
         )
         self.client.login(username=self.student.username, password=self.password)
diff --git a/lms/djangoapps/discussion/django_comment_client/base/views.py b/lms/djangoapps/discussion/django_comment_client/base/views.py
index d88c6e063a..f7036041b3 100644
--- a/lms/djangoapps/discussion/django_comment_client/base/views.py
+++ b/lms/djangoapps/discussion/django_comment_client/base/views.py
@@ -349,6 +349,42 @@ def track_comment_unreported_event(request, course, comment):
     track_forum_event(request, event_name, course, comment, event_data)
 
 
+def track_response_mark_event(request, course, comment, commentable_id, thread_type):
+    """
+    Send analytics event for response that is marked as endorsed or answered.
+    """
+    event_name = _EVENT_NAME_TEMPLATE.format(obj_type='response', action_name='mark')
+    if thread_type == 'question':
+        mark_type = 'Answer'
+    else:
+        mark_type = 'Endorse'
+    event_data = {
+        'discussion': {'id': comment.thread_id},
+        'commentable_id': commentable_id,
+        'mark_type': mark_type,
+        'target_username': comment.get('username')
+    }
+    track_forum_event(request, event_name, course, comment, event_data)
+
+
+def track_response_unmark_event(request, course, comment, commentable_id, thread_type):
+    """
+    Send analytics event for response that is marked as unendorsed or unanswered.
+    """
+    event_name = _EVENT_NAME_TEMPLATE.format(obj_type='response', action_name='unmark')
+    if thread_type == 'question':
+        mark_type = 'Answer'
+    else:
+        mark_type = 'Endorse'
+    event_data = {
+        'discussion': {'id': comment.thread_id},
+        'commentable_id': commentable_id,
+        'mark_type': mark_type,
+        'target_username': comment.get('username'),
+    }
+    track_forum_event(request, event_name, course, comment, event_data)
+
+
 def track_discussion_reported_event(request, course, cc_content):
     """
     Helper method for discussion reported events.
@@ -369,6 +405,20 @@ def track_discussion_unreported_event(request, course, cc_content):
         track_comment_unreported_event(request, course, cc_content)
 
 
+def track_forum_response_mark_event(request, course, cc_content, value):
+    """
+    Helper method for discussions response mark event
+    """
+    thread = cc.Thread.find(cc_content.thread_id)
+    commentable_id = thread.get('commentable_id')
+    thread_type = thread.get('thread_type')
+
+    if value:
+        track_response_mark_event(request, course, cc_content, commentable_id, thread_type)
+    else:
+        track_response_unmark_event(request, course, cc_content, commentable_id, thread_type)
+
+
 def permitted(func):
     """
     View decorator to verify the user is authorized to access this endpoint.
@@ -661,11 +711,14 @@ def endorse_comment(request, course_id, comment_id):
     """
     course_key = CourseKey.from_string(course_id)
     comment = cc.Comment.find(comment_id)
+    course = get_course_with_access(request.user, 'load', course_key)
     user = request.user
-    comment.endorsed = request.POST.get('endorsed', 'false').lower() == 'true'
+    endorsed = request.POST.get('endorsed', 'false').lower() == 'true'
+    comment.endorsed = endorsed
     comment.endorsement_user_id = user.id
     comment.save()
     comment_endorsed.send(sender=None, user=user, post=comment)
+    track_forum_response_mark_event(request, course, comment, endorsed)
     return JsonResponse(prepare_content(comment.to_dict(), course_key))
 
 
diff --git a/lms/djangoapps/discussion/rest_api/serializers.py b/lms/djangoapps/discussion/rest_api/serializers.py
index f3e361431f..13855317ee 100644
--- a/lms/djangoapps/discussion/rest_api/serializers.py
+++ b/lms/djangoapps/discussion/rest_api/serializers.py
@@ -16,7 +16,7 @@ from rest_framework import serializers
 from common.djangoapps.student.models import get_user_by_username_or_email
 from common.djangoapps.student.roles import GlobalStaff
 from lms.djangoapps.discussion.django_comment_client.base.views import track_thread_lock_unlock_event, \
-    track_thread_edited_event, track_comment_edited_event
+    track_thread_edited_event, track_comment_edited_event, track_forum_response_mark_event
 from lms.djangoapps.discussion.django_comment_client.utils import (
     course_discussion_division_enabled,
     get_group_id_for_user,
@@ -591,6 +591,7 @@ class CommentSerializer(_ContentSerializer):
             # endorsement_user_id on update
             requesting_user_id = self.context["cc_requester"]["id"]
             if key == "endorsed":
+                track_forum_response_mark_event(self.context['request'], self.context['course'], instance, val)
                 instance["endorsement_user_id"] = requesting_user_id
             if key == "body" and val:
                 instance["editing_user_id"] = requesting_user_id