diff --git a/lib/proto/audio_backend.proto b/lib/proto/audio_backend.proto
index 00b98aa..fea129a 100644
--- a/lib/proto/audio_backend.proto
+++ b/lib/proto/audio_backend.proto
@@ -6,8 +6,16 @@ import "google/protobuf/empty.proto";
 service AudioBackend {
   rpc StartClient(google.protobuf.Empty) returns (google.protobuf.Empty);
   rpc InitConnection(google.protobuf.Empty) returns (google.protobuf.Empty);
+  rpc GetAvailableBackends(google.protobuf.Empty) returns (BackendList);
 }
 
+message BackendList {
+  repeated Backend backends = 1;
+}
+
+message Backend {
+  string name = 1;
+}
 
 message Shirt {
   google.protobuf.Empty dummy = 1;