diff --git a/docs/api/supervisor/endpoints.md b/docs/api/supervisor/endpoints.md
index a0295157..61f87e36 100644
--- a/docs/api/supervisor/endpoints.md
+++ b/docs/api/supervisor/endpoints.md
@@ -624,6 +624,12 @@ Set the output volume for a specific application
 
 ### Auth
 
+<ApiEndpoint path="/auth" method="get">
+You can do authentication against Home Assistant Core using Basic Authentication.
+Use the `X-Supervisor-Token` header to provide the Supervisor authentication token.
+See the corresponding POST method to provide JSON or urlencoded credentials.
+</ApiEndpoint>
+
 <ApiEndpoint path="/auth" method="post">
 You can do authentication against Home Assistant Core.
 You can POST the data as JSON, as urlencoded (with `application/x-www-form-urlencoded` header) or by using use basic authentication.