diff --git a/core/ampi/DiameterClientAPI.h b/core/ampi/DiameterClientAPI.h
new file mode 100644
index 00000000..d36c2e69
--- /dev/null
+++ b/core/ampi/DiameterClientAPI.h
@@ -0,0 +1,58 @@
+#ifndef _DIAMETER_CLIENT_API_H
+#define _DIAMETER_CLIENT_API_H
+
+#include "AmEvent.h"
+ 
+#define 	AAA_AVP_FLAG_NONE               0x00
+#define 	AAA_AVP_FLAG_MANDATORY          0x40
+#define 	AAA_AVP_FLAG_RESERVED           0x1F
+#define 	AAA_AVP_FLAG_VENDOR_SPECIFIC    0x80
+#define 	AAA_AVP_FLAG_END_TO_END_ENCRYPT 0x20
+
+
+// new_connection
+//   string app_name
+//   string server_ip
+//   unsigned int server_port
+//   string origin_host
+//   string origin_realm
+//   string origin_ip
+//   unsigned int app_id
+//   unsigned int vendor_id
+//   string product_name
+
+
+// sendRequest
+//   string app_name
+//   unsigned int command_code
+//   unsigned int app_id
+//   arg val
+//   string sess_link
+
+//   args:  array
+//     [int avp_id, int flags, int vendor, blob data]
+
+//  returns :
+//    0    OK
+//    != 0 error
+
+// reply events : 
+//  avps:
+// [ code, flags, vendorId, type, data_blob ]
+
+struct DiameterReplyEvent 
+  : public AmEvent
+{
+  unsigned int commandCode;
+  unsigned int applicationId;
+
+  AmArg avps;
+
+ DiameterReplyEvent(unsigned int commandCode, 
+		    unsigned int applicationId, AmArg avps)
+   : AmEvent(0), commandCode(commandCode), 
+    applicationId(applicationId), avps(avps)
+  { }
+};
+
+#endif