diff --git a/Amazon-S3-API.md b/Amazon-S3-API.md
index b0077e7..32b5718 100644
--- a/Amazon-S3-API.md
+++ b/Amazon-S3-API.md
@@ -114,4 +114,8 @@ You can create as many users as needed. Each user can have multiple credentials.
     }
   ]
 }
-```
\ No newline at end of file
+```
+
+## Presigned URL
+
+Presigned URL is supported. See [[AWS-CLI-with-SeaweedFS#presigned-url]] for example.