diff --git a/openedx/core/djangoapps/discussions/views.py b/openedx/core/djangoapps/discussions/views.py
index 9949661464..e47662f4d3 100644
--- a/openedx/core/djangoapps/discussions/views.py
+++ b/openedx/core/djangoapps/discussions/views.py
@@ -1,6 +1,7 @@
 """
 Handle view-logic for the djangoapp
 """
+from lti_consumer.models import LtiConfiguration
 from opaque_keys.edx.keys import CourseKey
 from opaque_keys import InvalidKeyError
 from rest_framework import serializers
@@ -26,6 +27,20 @@ PROVIDER_FEATURE_MAP = {
 }
 
 
+class LtiSerializer(serializers.ModelSerializer):
+    """
+    Serialize LtiConfiguration responses
+    """
+    class Meta:
+        model = LtiConfiguration
+        fields = [
+            'lti_1p1_client_key',
+            'lti_1p1_client_secret',
+            'lti_1p1_launch_url',
+            'version',
+        ]
+
+
 @view_auth_classes()
 class DiscussionsConfigurationView(APIView):
     """
@@ -33,36 +48,45 @@ class DiscussionsConfigurationView(APIView):
     """
     permission_classes = (IsStaff,)
 
-    class Serializer(serializers.BaseSerializer):
+    class Serializer(serializers.ModelSerializer):
         """
         Serialize configuration responses
         """
+        class Meta:
+            model = DiscussionsConfiguration
+            fields = [
+                'context_key',
+                'enabled',
+                'provider_type',
+            ]
 
-        def create(self, validated_data):
-            """
-            Create and save a new instance
-            """
-            raise NotImplementedError
-
-        def to_internal_data(self, data):
+        def to_internal_value(self, data):
             """
             Transform the *incoming* primitive data into a native value.
             """
-            raise NotImplementedError
+            payload = {
+                'context_key': data.get('course_key', ''),
+                'enabled': data.get('enabled', False),
+                'lti_configuration': data.get('lti_configuration', {}),
+                'plugin_configuration': data.get('plugin_configuration', {}),
+                'provider_type': data.get('provider_type', ''),
+            }
+            return payload
 
         def to_representation(self, instance) -> dict:
             """
             Serialize data into a dictionary, to be used as a response
             """
-            payload = {
-                'context_key': str(instance.context_key),
-                'enabled': instance.enabled,
+            payload = super().to_representation(instance)
+            lti_configuration = LtiSerializer(instance.lti_configuration)
+            payload.update({
                 'features': {
                     'discussion-page',
                     'embedded-course-sections',
                     'lti',
                     'wcag-2.1',
                 },
+                'lti_configuration': lti_configuration.data,
                 'plugin_configuration': instance.plugin_configuration,
                 'providers': {
                     'active': instance.provider_type or None,
@@ -73,14 +97,36 @@ class DiscussionsConfigurationView(APIView):
                         for provider in instance.available_providers
                     },
                 },
-            }
+            })
             return payload
 
         def update(self, instance, validated_data):
             """
             Update and save an existing instance
             """
-            raise NotImplementedError
+            keys = [
+                'enabled',
+                'plugin_configuration',
+                'provider_type',
+            ]
+            for key in keys:
+                value = validated_data.get(key)
+                if value is not None:
+                    setattr(instance, key, value)
+            lti_configuration_data = validated_data.get('lti_configuration')
+            if lti_configuration_data:
+                lti_key = lti_configuration_data.get('lti_1p1_client_key')
+                lti_secret = lti_configuration_data.get('lti_1p1_client_secret')
+                lti_url = lti_configuration_data.get('lti_1p1_launch_url')
+                lti_configuration = instance.lti_configuration or LtiConfiguration()
+                lti_configuration.config_store = LtiConfiguration.CONFIG_ON_DB
+                lti_configuration.lti_1p1_client_key = lti_key
+                lti_configuration.lti_1p1_client_secret = lti_secret
+                lti_configuration.lti_1p1_launch_url = lti_url
+                lti_configuration.save()
+                instance.lti_configuration = lti_configuration
+            instance.save()
+            return instance
 
     # pylint: disable=redefined-builtin
     def get(self, request, course_key_string, **_kwargs) -> Response:
@@ -92,6 +138,19 @@ class DiscussionsConfigurationView(APIView):
         serializer = self.Serializer(configuration)
         return Response(serializer.data)
 
+    def post(self, request, course_key_string, **_kwargs) -> Response:
+        """
+        Handle HTTP/POST requests
+
+        TODO: Should we cleanup orphaned LTI config when swapping to cs_comments_service?
+        """
+        course_key = self._validate_course_key(course_key_string)
+        configuration = DiscussionsConfiguration.get(course_key)
+        serializer = self.Serializer(configuration, data=request.data, partial=True)
+        if serializer.is_valid(raise_exception=True):
+            serializer.save()
+        return Response(serializer.data)
+
     def _validate_course_key(self, course_key_string: str) -> CourseKey:
         """
         Validate and parse a course_key string, if supported