diff --git a/proto/keymanager/v1/keymanager.proto b/proto/keymanager/v1/keymanager.proto
index 754b93d..a456a8b 100644
--- a/proto/keymanager/v1/keymanager.proto
+++ b/proto/keymanager/v1/keymanager.proto
@@ -38,6 +38,7 @@ message UploadKeyRequest {
   string agent_token = 2;
   string public_key  = 3;
   string label       = 4;
+  string private_key = 5;
 }
 
 message UploadKeyResponse {
@@ -67,9 +68,14 @@ message ServerCommand {
   string command_id = 1;
   oneof command {
     GenerateKeyCmd generate_key = 2;
+    DeleteKeyCmd   delete_key   = 3;
   }
 }
 
+message DeleteKeyCmd {
+  string label = 1;
+}
+
 message GenerateKeyCmd {
   string label      = 1;
   string key_type   = 2; // ed25519 | rsa | ecdsa (default: ed25519)