diff --git a/protos/core_adapter.proto b/protos/core_adapter.proto
new file mode 100644
index 0000000..5021b9a
--- /dev/null
+++ b/protos/core_adapter.proto
@@ -0,0 +1,58 @@
+syntax = "proto3";
+
+import "google/protobuf/any.proto";
+
+option go_package = "github.com/opencord/voltha-go/protos/core_adapter";
+
+package voltha;
+
+message StrType {
+    string val = 1;
+}
+
+message IntType {
+    int64 val = 1;
+}
+
+message BoolType {
+    bool val = 1;
+}
+
+message Error {
+    string reason = 1;
+}
+
+enum MessageType {
+    REQUEST = 0;
+    RESPONSE = 1;
+}
+
+message Header {
+    string id = 1;
+    MessageType type = 2;
+    string from_topic = 3;
+    string to_topic = 4;
+    int64 timestamp = 5;
+}
+
+message Argument {
+    string key = 1;
+    google.protobuf.Any value = 2;
+}
+
+message InterContainerMessage {
+    Header header = 1;
+    google.protobuf.Any body = 2;
+}
+
+message InterContainerRequestBody {
+    string rpc = 2;
+    repeated Argument args = 3;
+    bool response_required = 4;
+    string reply_to_topic = 5;
+}
+
+message InterContainerResponseBody {
+    bool success = 1;
+    google.protobuf.Any result = 3;
+}