diff --git a/wallet/v1/msg.proto b/wallet/v1/msg.proto
index 5fd0ec7..523b34e 100644
--- a/wallet/v1/msg.proto
+++ b/wallet/v1/msg.proto
@@ -67,6 +67,17 @@ message Wallet {
   bool is_locked = 13;
 }
 
+message BalanceReq{
+  auth.v1.InternalIAM iam = 1;
+  int64 asset_id = 2;
+}
+
+message BalanceRes{
+  double available_balance = 1;
+  double locked_balance = 2;
+  double total_balance = 3;
+}
+
 /*
    Asset
 */
diff --git a/wallet/v1/srv.proto b/wallet/v1/srv.proto
index e3a244b..c464cc0 100644
--- a/wallet/v1/srv.proto
+++ b/wallet/v1/srv.proto
@@ -26,6 +26,7 @@ service WalletService {
 
   rpc UserInitWallet(UserInitWalletReq) returns (base.v1.StatusRes);
   rpc UserGetWalletList(auth.v1.InternalIAM) returns (WalletList);
+rpc GetBalance(BalanceReq) returns (BalanceRes);
 
   rpc UserGetTransactionList(UserGetTransactionListReq) returns (TransactionList);