diff --git a/docs/api/supervisor/endpoints.md b/docs/api/supervisor/endpoints.md
index 205d0b77e8a..1f976b904c4 100644
--- a/docs/api/supervisor/endpoints.md
+++ b/docs/api/supervisor/endpoints.md
@@ -3233,6 +3233,14 @@ Get the add-on icon
 Get the add-on logo
 </ApiEndpoint>
 
+<ApiEndpoint path="/store/addons/<addon>/availability" method="get">
+
+Returns 200 success status if the latest version of the add-on is able to be
+installed on the current system. Returns a 400 error status if it is not with a
+message explaining why.
+
+</ApiEndpoint>
+
 <ApiEndpoint path="/store/reload" method="post">
 
 Reloads the information stored about add-ons.