diff --git a/README.md b/README.md
index 4858daf55..c4a1af290 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,9 @@ Newly created NEAR account will have two full access keys. One that was provided
 
     URL: /add_key
     Request parameters: {
-        near_account_id: String,
+        // in case NEAR AccointId is not provided,
+        // it will be determined using recovery PK and NEAR Wallet APIs
+        near_account_id: Option(String),
         public_key: String,
         oidc_token: String
     }