diff --git a/services/backup/src/BackupServiceImpl.h b/services/backup/src/BackupServiceImpl.h
--- a/services/backup/src/BackupServiceImpl.h
+++ b/services/backup/src/BackupServiceImpl.h
@@ -31,6 +31,10 @@
   grpc::ServerWriteReactor<backup::PullBackupResponse> *PullBackup(
       grpc::CallbackServerContext *context,
       const backup::PullBackupRequest *request) override;
+
+  grpc::ServerReadReactor<backup::AddAttachmentRequest> *AddAttachment(
+      grpc::CallbackServerContext *context,
+      google::protobuf::Empty *response) override;
 };
 
 } // namespace network
diff --git a/services/backup/src/BackupServiceImpl.cpp b/services/backup/src/BackupServiceImpl.cpp
--- a/services/backup/src/BackupServiceImpl.cpp
+++ b/services/backup/src/BackupServiceImpl.cpp
@@ -1,5 +1,6 @@
 #include "BackupServiceImpl.h"
 
+#include "AddAttachmentReactor.h"
 #include "CreateNewBackupReactor.h"
 #include "PullBackupReactor.h"
 #include "RecoverBackupKeyReactor.h"
@@ -47,5 +48,12 @@
   return reactor;
 }
 
+grpc::ServerReadReactor<backup::AddAttachmentRequest> *
+BackupServiceImpl::AddAttachment(
+    grpc::CallbackServerContext *context,
+    google::protobuf::Empty *response) {
+  return new reactor::AddAttachmentReactor(response);
+}
+
 } // namespace network
 } // namespace comm