diff --git a/v3/src/markdown/identity-api-v3.md b/v3/src/markdown/identity-api-v3.md
index e6f62a9b..5a93944b 100644
--- a/v3/src/markdown/identity-api-v3.md
+++ b/v3/src/markdown/identity-api-v3.md
@@ -2966,6 +2966,10 @@ Response:
 
 #### List credentials: `GET /credentials`
 
+Optional query parameters:
+
+- `user_id` (string)
+
 Response:
 
     Status: 200 OK