diff --git a/netbox/circuits/api/nested_serializers.py b/netbox/circuits/api/nested_serializers.py
index 8fc1bfaf7..5f919b247 100644
--- a/netbox/circuits/api/nested_serializers.py
+++ b/netbox/circuits/api/nested_serializers.py
@@ -1,3 +1,5 @@
+from drf_spectacular.utils import extend_schema_field, extend_schema_serializer
+from drf_spectacular.types import OpenApiTypes
 from rest_framework import serializers
 
 from circuits.models import *
@@ -28,6 +30,9 @@ class NestedProviderNetworkSerializer(WritableNestedSerializer):
 # Providers
 #
 
+@extend_schema_serializer(
+    exclude_fields=('circuit_count',),
+)
 class NestedProviderSerializer(WritableNestedSerializer):
     url = serializers.HyperlinkedIdentityField(view_name='circuits-api:provider-detail')
     circuit_count = serializers.IntegerField(read_only=True)
@@ -41,6 +46,9 @@ class NestedProviderSerializer(WritableNestedSerializer):
 # Circuits
 #
 
+@extend_schema_serializer(
+    exclude_fields=('circuit_count',),
+)
 class NestedCircuitTypeSerializer(WritableNestedSerializer):
     url = serializers.HyperlinkedIdentityField(view_name='circuits-api:circuittype-detail')
     circuit_count = serializers.IntegerField(read_only=True)
diff --git a/netbox/circuits/api/serializers.py b/netbox/circuits/api/serializers.py
index 816c696d2..d48d79efb 100644
--- a/netbox/circuits/api/serializers.py
+++ b/netbox/circuits/api/serializers.py
@@ -70,8 +70,8 @@ class CircuitTypeSerializer(NetBoxModelSerializer):
 
 class CircuitCircuitTerminationSerializer(WritableNestedSerializer):
     url = serializers.HyperlinkedIdentityField(view_name='circuits-api:circuittermination-detail')
-    site = NestedSiteSerializer()
-    provider_network = NestedProviderNetworkSerializer()
+    site = NestedSiteSerializer(allow_null=True)
+    provider_network = NestedProviderNetworkSerializer(allow_null=True)
 
     class Meta:
         model = CircuitTermination
@@ -87,8 +87,8 @@ class CircuitSerializer(NetBoxModelSerializer):
     status = ChoiceField(choices=CircuitStatusChoices, required=False)
     type = NestedCircuitTypeSerializer()
     tenant = NestedTenantSerializer(required=False, allow_null=True)
-    termination_a = CircuitCircuitTerminationSerializer(read_only=True)
-    termination_z = CircuitCircuitTerminationSerializer(read_only=True)
+    termination_a = CircuitCircuitTerminationSerializer(read_only=True, allow_null=True)
+    termination_z = CircuitCircuitTerminationSerializer(read_only=True, allow_null=True)
 
     class Meta:
         model = Circuit