diff --git a/apps/pg/views.py b/apps/pg/views.py
index 50759bf..c58ce1e 100644
--- a/apps/pg/views.py
+++ b/apps/pg/views.py
@@ -8,6 +8,7 @@ from oauth2_provider.contrib.rest_framework import IsAuthenticatedOrTokenHasScop
 from rest_framework import generics
 from rest_framework.response import Response
 from rest_framework.views import APIView
+from drf_spectacular.utils import extend_schema, OpenApiParameter
 
 from utils.commons import calculate_pna_commission
 from .constans import StateChoices
@@ -19,6 +20,18 @@ from ..users.models import User
 
 
 class CalculateCommissionView(APIView):
+    @extend_schema(
+        parameters=[
+            OpenApiParameter(
+                name='amount',
+                required=True,
+                type=float,
+                location=OpenApiParameter.QUERY,
+                description='مبلغ'
+            )
+        ],
+        responses=CommissionSerializer
+    )
     def get(self, request):
         serializer = CommissionSerializer(data=request.query_params)
         serializer.is_valid(raise_exception=True)