diff --git a/src/sentry/models/groupopenperiod.py b/src/sentry/models/groupopenperiod.py
index 4611043db29e4e..0a56d8e479bc6b 100644
--- a/src/sentry/models/groupopenperiod.py
+++ b/src/sentry/models/groupopenperiod.py
@@ -143,7 +143,6 @@ def get_open_periods_for_group(
     group: Group,
     query_start: datetime | None = None,
     query_end: datetime | None = None,
-    limit: int | None = None,
 ) -> BaseQuerySet[GroupOpenPeriod]:
     """
     Get open periods for a group that overlap with the query time range.
@@ -173,7 +172,7 @@ def get_open_periods_for_group(
     ended_after_query_starts = Q(date_ended__gte=query_start)
     still_open = Q(date_ended__isnull=True)
 
-    group_open_periods = (
+    return (
         GroupOpenPeriod.objects.filter(
             group=group,
         )
@@ -181,8 +180,6 @@ def get_open_periods_for_group(
         .order_by("-date_started")
     )
 
-    return group_open_periods[:limit]
-
 
 def create_open_period(group: Group, start_time: datetime, event_id: str | None = None) -> None:
     # no-op if the group does not create open periods
diff --git a/src/sentry/workflow_engine/endpoints/organization_open_periods.py b/src/sentry/workflow_engine/endpoints/organization_open_periods.py
index 2ec2788e38a1d8..8221a2992091ed 100644
--- a/src/sentry/workflow_engine/endpoints/organization_open_periods.py
+++ b/src/sentry/workflow_engine/endpoints/organization_open_periods.py
@@ -93,6 +93,13 @@ def get_group_from_group_id(self, group_id: str, organization: Organization) ->
                 type=str,
                 description="ID of the issue group.",
             ),
+            OpenApiParameter(
+                name="eventId",
+                location="query",
+                required=False,
+                type=str,
+                description="ID of the event to filter open periods by.",
+            ),
         ],
         responses={
             200: GroupOpenPeriodSerializer,
@@ -113,6 +120,7 @@ def get(self, request: Request, organization: Organization) -> Response:
 
         detector_id_param = request.GET.get("detectorId")
         group_id_param = request.GET.get("groupId")
+        event_id_param = request.GET.get("eventId")
         # determines the time we need to subtract off of each timestamp before returning the data
         bucket_size_param = request.GET.get("bucketSize", 0)
 
@@ -133,19 +141,15 @@ def get(self, request: Request, organization: Organization) -> Response:
         if not target_group:
             return self.paginate(request=request, queryset=[])
 
-        limit = None
-        per_page = request.GET.get("per_page")
-        if per_page:
-            limit = int(per_page)
-            assert limit > 0
-
         open_periods = get_open_periods_for_group(
             group=target_group,
             query_start=start,
             query_end=end,
-            limit=limit,
         )
-        # need to pass start, end to serializer
+
+        if event_id_param:
+            open_periods = open_periods.filter(event_id=event_id_param)
+
         return self.paginate(
             request=request,
             queryset=open_periods,
diff --git a/tests/sentry/workflow_engine/endpoints/test_organization_open_periods.py b/tests/sentry/workflow_engine/endpoints/test_organization_open_periods.py
index 13571b0bf15430..7e778b80ae2169 100644
--- a/tests/sentry/workflow_engine/endpoints/test_organization_open_periods.py
+++ b/tests/sentry/workflow_engine/endpoints/test_organization_open_periods.py
@@ -8,7 +8,6 @@
 from sentry.models.groupopenperiod import (
     GroupOpenPeriod,
     create_open_period,
-    get_open_periods_for_group,
     update_group_open_period,
 )
 from sentry.models.groupopenperiodactivity import GroupOpenPeriodActivity, OpenPeriodActivityType
@@ -250,7 +249,6 @@ def test_open_periods_limit(self) -> None:
             resolution_time=resolved_time,
             resolution_activity=resolve_activity,
         )
-        get_open_periods_for_group(self.group)
 
         unresolved_time = timezone.now()
         self.group.status = GroupStatus.UNRESOLVED
@@ -457,3 +455,52 @@ def test_open_period_activities_time_period(self) -> None:
             "value": PriorityLevel(self.group.priority).to_str(),
             "dateCreated": update_gopa.date_added,
         }
+
+    def test_filter_by_event_id(self) -> None:
+        GroupOpenPeriod.objects.filter(group=self.group).delete()
+
+        event_id_1 = "a" * 32
+        event_id_2 = "b" * 32
+
+        base_time = timezone.now() - timedelta(minutes=20)
+
+        # Update group.first_seen to ensure default time range captures our test data
+        self.group.first_seen = base_time
+        self.group.save()
+
+        open_period_1 = GroupOpenPeriod.objects.create(
+            group=self.group,
+            project=self.group.project,
+            date_started=base_time,
+            date_ended=base_time + timedelta(minutes=5),
+            event_id=event_id_1,
+        )
+        open_period_2 = GroupOpenPeriod.objects.create(
+            group=self.group,
+            project=self.group.project,
+            date_started=base_time + timedelta(minutes=6),
+            date_ended=base_time + timedelta(minutes=10),
+            event_id=event_id_2,
+        )
+
+        response = self.get_success_response(
+            *self.get_url_args(),
+            qs_params={
+                "groupId": self.group.id,
+                "eventId": event_id_1,
+            },
+        )
+
+        assert len(response.data) == 1
+        assert response.data[0]["id"] == str(open_period_1.id)
+
+        response = self.get_success_response(
+            *self.get_url_args(),
+            qs_params={
+                "groupId": self.group.id,
+                "eventId": event_id_2,
+            },
+        )
+
+        assert len(response.data) == 1
+        assert response.data[0]["id"] == str(open_period_2.id)