diff --git a/docs_prod/cross-project-task-routing/phase-roadmap.md b/docs_prod/cross-project-task-routing/phase-roadmap.md
index 57f7565..302aedb 100644
--- a/docs_prod/cross-project-task-routing/phase-roadmap.md
+++ b/docs_prod/cross-project-task-routing/phase-roadmap.md
@@ -99,10 +99,10 @@
 - отображение целевого проекта
 - отображение исполнителей целевого контура
 - отображение фактической даты последнего изменения
+- индикатор новых изменений в source-side списке на базе unread уведомлений
 - открытие source-side detail экрана
 
 Что еще остается на следующие этапы:
-- индикатор новых изменений
 - полноценная зеркальная activity/history
 - уведомления
 
@@ -195,6 +195,7 @@
 - notification payload несет `external contour request id` и `target issue id`
 - список уведомлений помечает такие записи как `is_external_contour = true`
 - notification preview может открыть source-side карточку внешнего контура, а не обычный issue preview
+- открытие source-side карточки помечает связанные unread уведомления как прочитанные и снимает индикатор новых изменений в списке
 
 Что остается:
 - in-app уведомления на явные source-side решения `Принять / Отклонить`
diff --git a/plane-src/apps/api/plane/api/serializers/external_contours.py b/plane-src/apps/api/plane/api/serializers/external_contours.py
index 2e0094f..ff7eab7 100644
--- a/plane-src/apps/api/plane/api/serializers/external_contours.py
+++ b/plane-src/apps/api/plane/api/serializers/external_contours.py
@@ -10,7 +10,7 @@ from .project import ProjectLiteSerializer
 from .state import StateLiteSerializer
 from .user import UserLiteSerializer
 from plane.app.serializers.issue import LabelSerializer
-from plane.db.models import FileAsset, IntakeIssue, Issue, IssueActivity, IssueComment, Label, Project
+from plane.db.models import FileAsset, IntakeIssue, Issue, IssueActivity, IssueComment, Label, Notification, Project
 
 
 class ExternalContourIssuePayloadSerializer(serializers.Serializer):
@@ -149,6 +149,7 @@ class ExternalContourMirroredActivitySerializer(BaseSerializer):
 
 
 class ExternalContourRequestSerializer(BaseSerializer):
+    has_unread_updates = serializers.SerializerMethodField()
     issue = ExternalContourIssueSerializer(read_only=True)
     mirrored_activity = serializers.SerializerMethodField()
     mirrored_attachments = serializers.SerializerMethodField()
@@ -172,6 +173,7 @@ class ExternalContourRequestSerializer(BaseSerializer):
             "created_at",
             "updated_at",
             "created_by",
+            "has_unread_updates",
             "issue",
             "mirrored_activity",
             "mirrored_attachments",
@@ -193,6 +195,20 @@ class ExternalContourRequestSerializer(BaseSerializer):
     def get_source_project_id(self, obj):
         return obj.extra.get("source_project_id")
 
+    def get_has_unread_updates(self, obj):
+        request = self.context.get("request")
+        user = getattr(request, "user", None)
+        user_id = getattr(user, "id", None)
+        if not user_id:
+            return False
+
+        return Notification.objects.filter(
+            receiver_id=user_id,
+            sender__startswith="in_app:external_contours:",
+            read_at__isnull=True,
+            data__issue__id=str(obj.id),
+        ).exists()
+
     def get_mirrored_activity(self, obj):
         if not self.context.get("include_mirror_data") or not obj.issue_id:
             return []
diff --git a/plane-src/apps/api/plane/api/views/external_contours.py b/plane-src/apps/api/plane/api/views/external_contours.py
index 300c1d9..1e985b1 100644
--- a/plane-src/apps/api/plane/api/views/external_contours.py
+++ b/plane-src/apps/api/plane/api/views/external_contours.py
@@ -21,7 +21,7 @@ from plane.api.serializers import (
 from plane.api.serializers.issue import IssueSerializer as IssueCreateSerializer
 from plane.app.permissions import ProjectLitePermission
 from plane.app.views.base import BaseAPIView
-from plane.db.models import FileAsset, Intake, IntakeIssue, Label, Project, ProjectMember, State, StateGroup
+from plane.db.models import FileAsset, Intake, IntakeIssue, Label, Notification, Project, ProjectMember, State, StateGroup
 from plane.db.models.intake import IntakeIssueStatus, SourceType
 from plane.settings.storage import S3Storage
 from plane.utils.external_contours import create_external_contour_issue_comment
@@ -61,7 +61,11 @@ class ExternalContourListCreateEndpoint(BaseAPIView):
         )
 
     def get(self, request, slug, project_id):
-        serializer = ExternalContourRequestSerializer(self.get_queryset(), many=True)
+        serializer = ExternalContourRequestSerializer(
+            self.get_queryset(),
+            many=True,
+            context={"request": request},
+        )
         return Response(
             {
                 "results": serializer.data,
@@ -174,7 +178,8 @@ class ExternalContourListCreateEndpoint(BaseAPIView):
                 "issue__created_by",
             )
             .prefetch_related("issue__issue_assignee__assignee", "issue__label_issue__label")
-            .get(pk=intake_issue.id)
+            .get(pk=intake_issue.id),
+            context={"request": request},
         )
         return Response(response_serializer.data, status=status.HTTP_201_CREATED)
 
@@ -273,14 +278,28 @@ class ExternalContourDetailEndpoint(BaseAPIView):
             .prefetch_related("issue__issue_assignee__assignee", "issue__label_issue__label")
         )
 
+    def mark_request_notifications_read(self, user, contour_request):
+        user_id = getattr(user, "id", None)
+        if not user_id:
+            return
+
+        Notification.objects.filter(
+            receiver_id=user_id,
+            sender__startswith="in_app:external_contours:",
+            read_at__isnull=True,
+            data__issue__id=str(contour_request.id),
+        ).update(read_at=timezone.now())
+
     def get(self, request, slug, project_id, request_id):
         contour_request = get_object_or_404(self.get_queryset())
+        self.mark_request_notifications_read(request.user, contour_request)
         serializer = ExternalContourRequestSerializer(
             contour_request,
             context={
                 "include_mirror_data": True,
                 "workspace_slug": slug,
                 "source_project_id": str(project_id),
+                "request": request,
             },
         )
         return Response(serializer.data, status=status.HTTP_200_OK)
@@ -366,6 +385,12 @@ class ExternalContourDecisionEndpoint(BaseAPIView):
             contour_request.save(update_fields=["extra", "updated_at"])
 
         contour_request.refresh_from_db()
+        Notification.objects.filter(
+            receiver_id=request.user.id,
+            sender__startswith="in_app:external_contours:",
+            read_at__isnull=True,
+            data__issue__id=str(contour_request.id),
+        ).update(read_at=timezone.now())
         serializer = ExternalContourRequestSerializer(
             IntakeIssue.objects.select_related(
                 "issue",
@@ -379,6 +404,7 @@ class ExternalContourDecisionEndpoint(BaseAPIView):
                 "include_mirror_data": True,
                 "workspace_slug": slug,
                 "source_project_id": str(project_id),
+                "request": request,
             },
         )
         return Response(serializer.data, status=status.HTTP_200_OK)
@@ -425,12 +451,19 @@ class ExternalContourReplyEndpoint(BaseAPIView):
             return Response({"error": exc.message_dict if hasattr(exc, "message_dict") else str(exc)}, status=status.HTTP_400_BAD_REQUEST)
 
         contour_request.refresh_from_db()
+        Notification.objects.filter(
+            receiver_id=request.user.id,
+            sender__startswith="in_app:external_contours:",
+            read_at__isnull=True,
+            data__issue__id=str(contour_request.id),
+        ).update(read_at=timezone.now())
         response_serializer = ExternalContourRequestSerializer(
             contour_request,
             context={
                 "include_mirror_data": True,
                 "workspace_slug": slug,
                 "source_project_id": str(project_id),
+                "request": request,
             },
         )
         return Response(response_serializer.data, status=status.HTTP_200_OK)
diff --git a/plane-src/apps/api/plane/app/views/external_contours.py b/plane-src/apps/api/plane/app/views/external_contours.py
index 300c1d9..1e985b1 100644
--- a/plane-src/apps/api/plane/app/views/external_contours.py
+++ b/plane-src/apps/api/plane/app/views/external_contours.py
@@ -21,7 +21,7 @@ from plane.api.serializers import (
 from plane.api.serializers.issue import IssueSerializer as IssueCreateSerializer
 from plane.app.permissions import ProjectLitePermission
 from plane.app.views.base import BaseAPIView
-from plane.db.models import FileAsset, Intake, IntakeIssue, Label, Project, ProjectMember, State, StateGroup
+from plane.db.models import FileAsset, Intake, IntakeIssue, Label, Notification, Project, ProjectMember, State, StateGroup
 from plane.db.models.intake import IntakeIssueStatus, SourceType
 from plane.settings.storage import S3Storage
 from plane.utils.external_contours import create_external_contour_issue_comment
@@ -61,7 +61,11 @@ class ExternalContourListCreateEndpoint(BaseAPIView):
         )
 
     def get(self, request, slug, project_id):
-        serializer = ExternalContourRequestSerializer(self.get_queryset(), many=True)
+        serializer = ExternalContourRequestSerializer(
+            self.get_queryset(),
+            many=True,
+            context={"request": request},
+        )
         return Response(
             {
                 "results": serializer.data,
@@ -174,7 +178,8 @@ class ExternalContourListCreateEndpoint(BaseAPIView):
                 "issue__created_by",
             )
             .prefetch_related("issue__issue_assignee__assignee", "issue__label_issue__label")
-            .get(pk=intake_issue.id)
+            .get(pk=intake_issue.id),
+            context={"request": request},
         )
         return Response(response_serializer.data, status=status.HTTP_201_CREATED)
 
@@ -273,14 +278,28 @@ class ExternalContourDetailEndpoint(BaseAPIView):
             .prefetch_related("issue__issue_assignee__assignee", "issue__label_issue__label")
         )
 
+    def mark_request_notifications_read(self, user, contour_request):
+        user_id = getattr(user, "id", None)
+        if not user_id:
+            return
+
+        Notification.objects.filter(
+            receiver_id=user_id,
+            sender__startswith="in_app:external_contours:",
+            read_at__isnull=True,
+            data__issue__id=str(contour_request.id),
+        ).update(read_at=timezone.now())
+
     def get(self, request, slug, project_id, request_id):
         contour_request = get_object_or_404(self.get_queryset())
+        self.mark_request_notifications_read(request.user, contour_request)
         serializer = ExternalContourRequestSerializer(
             contour_request,
             context={
                 "include_mirror_data": True,
                 "workspace_slug": slug,
                 "source_project_id": str(project_id),
+                "request": request,
             },
         )
         return Response(serializer.data, status=status.HTTP_200_OK)
@@ -366,6 +385,12 @@ class ExternalContourDecisionEndpoint(BaseAPIView):
             contour_request.save(update_fields=["extra", "updated_at"])
 
         contour_request.refresh_from_db()
+        Notification.objects.filter(
+            receiver_id=request.user.id,
+            sender__startswith="in_app:external_contours:",
+            read_at__isnull=True,
+            data__issue__id=str(contour_request.id),
+        ).update(read_at=timezone.now())
         serializer = ExternalContourRequestSerializer(
             IntakeIssue.objects.select_related(
                 "issue",
@@ -379,6 +404,7 @@ class ExternalContourDecisionEndpoint(BaseAPIView):
                 "include_mirror_data": True,
                 "workspace_slug": slug,
                 "source_project_id": str(project_id),
+                "request": request,
             },
         )
         return Response(serializer.data, status=status.HTTP_200_OK)
@@ -425,12 +451,19 @@ class ExternalContourReplyEndpoint(BaseAPIView):
             return Response({"error": exc.message_dict if hasattr(exc, "message_dict") else str(exc)}, status=status.HTTP_400_BAD_REQUEST)
 
         contour_request.refresh_from_db()
+        Notification.objects.filter(
+            receiver_id=request.user.id,
+            sender__startswith="in_app:external_contours:",
+            read_at__isnull=True,
+            data__issue__id=str(contour_request.id),
+        ).update(read_at=timezone.now())
         response_serializer = ExternalContourRequestSerializer(
             contour_request,
             context={
                 "include_mirror_data": True,
                 "workspace_slug": slug,
                 "source_project_id": str(project_id),
+                "request": request,
             },
         )
         return Response(response_serializer.data, status=status.HTTP_200_OK)
diff --git a/plane-src/apps/web/ce/components/projects/external-contours/list-item.tsx b/plane-src/apps/web/ce/components/projects/external-contours/list-item.tsx
index bef9b6d..6cc7e5a 100644
--- a/plane-src/apps/web/ce/components/projects/external-contours/list-item.tsx
+++ b/plane-src/apps/web/ce/components/projects/external-contours/list-item.tsx
@@ -65,6 +65,11 @@ export const ExternalContoursListItem = observer(function ExternalContoursListIt
                 {issue.project_detail?.identifier || "REQ"}-{issue.sequence_id}
               </span>
               {issue.project_detail?.name && <span className="truncate text-placeholder">{issue.project_detail.name}</span>}
+              {request.has_unread_updates && (
+                <Tooltip tooltipHeading={t("external_contours_page.list.unread_updates")} isMobile={isMobile}>
+                  <span className="size-2 rounded-full bg-accent-primary" />
+                </Tooltip>
+              )}
             </div>
             <ExternalContourStatePill request={request} />
           </div>
diff --git a/plane-src/packages/i18n/src/locales/en/translations.ts b/plane-src/packages/i18n/src/locales/en/translations.ts
index d8be6dd..82bf78a 100644
--- a/plane-src/packages/i18n/src/locales/en/translations.ts
+++ b/plane-src/packages/i18n/src/locales/en/translations.ts
@@ -296,10 +296,11 @@ export default {
       open: "Open",
       closed: "Closed",
     },
-    list: {
-      last_updated: "Last updated",
-      unassigned: "Unassigned",
-    },
+      list: {
+        last_updated: "Last updated",
+        unassigned: "Unassigned",
+        unread_updates: "New updates available",
+      },
     empty_state: {
       title: "External contours module is ready for the next stage",
       description:
diff --git a/plane-src/packages/i18n/src/locales/ru/translations.ts b/plane-src/packages/i18n/src/locales/ru/translations.ts
index 04030bb..107a104 100644
--- a/plane-src/packages/i18n/src/locales/ru/translations.ts
+++ b/plane-src/packages/i18n/src/locales/ru/translations.ts
@@ -453,10 +453,11 @@ export default {
       open: "Открытые",
       closed: "Закрытые",
     },
-    list: {
-      last_updated: "Последнее изменение",
-      unassigned: "Не назначено",
-    },
+      list: {
+        last_updated: "Последнее изменение",
+        unassigned: "Не назначено",
+        unread_updates: "Есть новые изменения",
+      },
     empty_state: {
       title: "Модуль внешних контуров подготовлен",
       description:
diff --git a/plane-src/packages/types/src/external-contours.ts b/plane-src/packages/types/src/external-contours.ts
index 1a27faf..7e01f3a 100644
--- a/plane-src/packages/types/src/external-contours.ts
+++ b/plane-src/packages/types/src/external-contours.ts
@@ -56,6 +56,7 @@ export type TExternalContourMirroredActivity = {
 export type TExternalContourRequest = {
   created_at: string;
   created_by: string | null;
+  has_unread_updates?: boolean;
   id: string;
   issue: TExternalContourIssue;
   mirrored_activity?: TExternalContourMirroredActivity[];