diff --git a/pkg/capabilities/capabilities.go b/pkg/capabilities/capabilities.go
index 86565d599..a06cf8fce 100644
--- a/pkg/capabilities/capabilities.go
+++ b/pkg/capabilities/capabilities.go
@@ -74,6 +74,7 @@ type CapabilityResponse struct {
 
 type ResponseMetadata struct {
 	Metering []MeteringNodeDetail
+	CapDON_N uint32
 }
 
 type MeteringNodeDetail struct {
diff --git a/pkg/capabilities/pb/capabilities.pb.go b/pkg/capabilities/pb/capabilities.pb.go
index d82ad26e7..f53a95ecb 100644
--- a/pkg/capabilities/pb/capabilities.pb.go
+++ b/pkg/capabilities/pb/capabilities.pb.go
@@ -796,7 +796,9 @@ type ResponseMetadata struct {
 	//
 	// If you are working with this in a capability, you should not emit
 	// more than one metering report per node.
-	Metering      []*pb1.MeteringReportNodeDetail `protobuf:"bytes,1,rep,name=metering,proto3" json:"metering,omitempty"`
+	Metering []*pb1.MeteringReportNodeDetail `protobuf:"bytes,1,rep,name=metering,proto3" json:"metering,omitempty"`
+	// capdon_n represents the total number of nodes in a capability don.
+	CapdonN       uint32 `protobuf:"varint,2,opt,name=capdon_n,json=capdonN,proto3" json:"capdon_n,omitempty"`
 	unknownFields protoimpl.UnknownFields
 	sizeCache     protoimpl.SizeCache
 }
@@ -838,6 +840,13 @@ func (x *ResponseMetadata) GetMetering() []*pb1.MeteringReportNodeDetail {
 	return nil
 }
 
+func (x *ResponseMetadata) GetCapdonN() uint32 {
+	if x != nil {
+		return x.CapdonN
+	}
+	return 0
+}
+
 type RegistrationMetadata struct {
 	state         protoimpl.MessageState `protogen:"open.v1"`
 	WorkflowId    string                 `protobuf:"bytes,1,opt,name=workflow_id,json=workflowId,proto3" json:"workflow_id,omitempty"`
@@ -1223,9 +1232,10 @@ const file_capabilities_proto_rawDesc = "" +
 	"\x05value\x18\x01 \x01(\v2\x0e.values.v1.MapR\x05value\x12\x14\n" +
 	"\x05error\x18\x02 \x01(\tR\x05error\x12:\n" +
 	"\bmetadata\x18\x03 \x01(\v2\x1e.capabilities.ResponseMetadataR\bmetadata\x12.\n" +
-	"\apayload\x18\x04 \x01(\v2\x14.google.protobuf.AnyR\apayload\"R\n" +
+	"\apayload\x18\x04 \x01(\v2\x14.google.protobuf.AnyR\apayload\"m\n" +
 	"\x10ResponseMetadata\x12>\n" +
-	"\bmetering\x18\x01 \x03(\v2\".metering.MeteringReportNodeDetailR\bmetering\"\x81\x01\n" +
+	"\bmetering\x18\x01 \x03(\v2\".metering.MeteringReportNodeDetailR\bmetering\x12\x19\n" +
+	"\bcapdon_n\x18\x02 \x01(\rR\acapdonN\"\x81\x01\n" +
 	"\x14RegistrationMetadata\x12\x1f\n" +
 	"\vworkflow_id\x18\x01 \x01(\tR\n" +
 	"workflowId\x12!\n" +
diff --git a/pkg/capabilities/pb/capabilities.proto b/pkg/capabilities/pb/capabilities.proto
index b18ca5e5a..bb491b372 100644
--- a/pkg/capabilities/pb/capabilities.proto
+++ b/pkg/capabilities/pb/capabilities.proto
@@ -127,6 +127,8 @@ message ResponseMetadata {
   // If you are working with this in a capability, you should not emit
   // more than one metering report per node.
   repeated metering.MeteringReportNodeDetail metering = 1;
+  // capdon_n represents the total number of nodes in a capability don.
+  uint32 capdon_n = 2;
 }
 
 message RegistrationMetadata {
diff --git a/pkg/capabilities/pb/capabilities_helpers.go b/pkg/capabilities/pb/capabilities_helpers.go
index 4bf2e8583..8c03be56d 100644
--- a/pkg/capabilities/pb/capabilities_helpers.go
+++ b/pkg/capabilities/pb/capabilities_helpers.go
@@ -90,6 +90,7 @@ func CapabilityResponseToProto(resp capabilities.CapabilityResponse) *Capability
 		Value: values.ProtoMap(resp.Value),
 		Metadata: &ResponseMetadata{
 			Metering: metering,
+			CapdonN:  resp.Metadata.CapDON_N,
 		},
 		Payload: resp.Payload,
 	}
@@ -166,6 +167,7 @@ func CapabilityResponseFromProto(pr *CapabilityResponse) (capabilities.Capabilit
 		Value: val,
 		Metadata: capabilities.ResponseMetadata{
 			Metering: metering,
+			CapDON_N: pr.Metadata.GetCapdonN(),
 		},
 		Payload: pr.Payload,
 	}