diff --git a/buffet/notification/notification_delegate.h b/buffet/notification/notification_delegate.h
new file mode 100644
index 0000000..06b30d4
--- /dev/null
+++ b/buffet/notification/notification_delegate.h
@@ -0,0 +1,24 @@
+// Copyright 2015 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BUFFET_NOTIFICATION_NOTIFICATION_DELEGATE_H_
+#define BUFFET_NOTIFICATION_NOTIFICATION_DELEGATE_H_
+
+#include <string>
+
+namespace buffet {
+
+class NotificationDelegate {
+ public:
+  virtual void OnConnected(const std::string& channel_name) = 0;
+  virtual void OnDisconnected() = 0;
+  virtual void OnPermanentFailure() = 0;
+
+ protected:
+  virtual ~NotificationDelegate() = default;
+};
+
+}  // namespace buffet
+
+#endif  // BUFFET_NOTIFICATION_NOTIFICATION_DELEGATE_H_