diff --git a/docs/sources/oncall-api-reference/alertgroups.md b/docs/sources/oncall-api-reference/alertgroups.md
index 42931b18..e5126fb7 100644
--- a/docs/sources/oncall-api-reference/alertgroups.md
+++ b/docs/sources/oncall-api-reference/alertgroups.md
@@ -36,7 +36,8 @@ The above command returns JSON structured in the following way:
       "permalinks": {
         "slack": "https://ghostbusters.slack.com/archives/C1H9RESGA/p135854651500008",
         "telegram": "https://t.me/c/5354/1234?thread=1234"
-      }
+      },
+      "silenced_at": "2020-05-19T13:37:01.429805Z",
     }
   ],
   "current_page_number": 1,
diff --git a/engine/apps/public_api/serializers/incidents.py b/engine/apps/public_api/serializers/incidents.py
index 24ec1c6b..90cf4abf 100644
--- a/engine/apps/public_api/serializers/incidents.py
+++ b/engine/apps/public_api/serializers/incidents.py
@@ -43,6 +43,7 @@ class IncidentSerializer(EagerLoadingMixin, serializers.ModelSerializer):
             "acknowledged_by",
             "title",
             "permalinks",
+            "silenced_at",
         ]
 
     def get_title(self, obj):
diff --git a/engine/apps/public_api/tests/test_alert_groups.py b/engine/apps/public_api/tests/test_alert_groups.py
index 247239ec..e3902f22 100644
--- a/engine/apps/public_api/tests/test_alert_groups.py
+++ b/engine/apps/public_api/tests/test_alert_groups.py
@@ -29,6 +29,11 @@ def construct_expected_response_from_alert_groups(alert_groups):
             acknowledged_at = alert_group.acknowledged_at.isoformat()
             acknowledged_at = acknowledged_at[:-6] + "Z"
 
+        silenced_at = None
+        if alert_group.silenced_at:
+            silenced_at = alert_group.silenced_at.isoformat()
+            silenced_at = silenced_at[:-6] + "Z"
+
         def user_pk_or_none(alert_group, user_field):
             u = getattr(alert_group, user_field)
             if u is not None:
@@ -52,6 +57,7 @@ def construct_expected_response_from_alert_groups(alert_groups):
                     "telegram": None,
                     "web": alert_group.web_link,
                 },
+                "silenced_at": silenced_at,
             }
         )
     return {