diff --git a/api-schema.yml b/api-schema.yml
index ff1a82c7d..1a05246d8 100644
--- a/api-schema.yml
+++ b/api-schema.yml
@@ -130,10 +130,9 @@ paths:
               schema:
                 $ref: '#/components/schemas/CreateChatCompletionResponse'
           description: ''
-  /api/participants/:
+  /api/participants:
     post:
       operationId: update_participant_data
-      description: Upsert participant data for all specified experiments in the payload
       summary: Update Participant Data
       tags:
       - Participants
diff --git a/apps/api/urls.py b/apps/api/urls.py
index 45252be31..9e01696f1 100644
--- a/apps/api/urls.py
+++ b/apps/api/urls.py
@@ -16,7 +16,7 @@
 ]
 
 urlpatterns = [
-    path("participants/", views.update_participant_data, name="update-participant-data"),
+    path("participants/", views.update_participant_data_old, name="update-participant-data-old"),
     # Duplicate update-participant-data without a trailing "/" for backwards compatibility
     path("participants", views.update_participant_data, name="update-participant-data"),
     path("openai/<uuid:experiment_id>/chat/completions", openai.chat_completions, name="openai-chat-completions"),
diff --git a/apps/api/views.py b/apps/api/views.py
index a4b5dff69..d60b3aa54 100644
--- a/apps/api/views.py
+++ b/apps/api/views.py
@@ -125,6 +125,18 @@ def get_queryset(self):
 @api_view(["POST"])
 @permission_required("experiments.change_participantdata")
 def update_participant_data(request):
+    return _update_participant_data(request)
+
+
+@extend_schema(exclude=True)
+@api_view(["POST"])
+@permission_required("experiments.change_participantdata")
+def update_participant_data_old(request):
+    # This endpoint is kept for backwards compatibility of the path with a trailing "/"
+    return _update_participant_data(request)
+
+
+def _update_participant_data(request):
     """
     Upsert participant data for all specified experiments in the payload
     """