diff --git a/lib/galaxy/webapps/galaxy/api/tools.py b/lib/galaxy/webapps/galaxy/api/tools.py
index dc3eeb9cd81b..455a68809f31 100644
--- a/lib/galaxy/webapps/galaxy/api/tools.py
+++ b/lib/galaxy/webapps/galaxy/api/tools.py
@@ -123,7 +123,7 @@ async def fetch_form(
         summary="Execute tool with a given parameter payload",
         route_class_override=JsonApiRoute,
     )
-    def execute_json(
+    async def execute_json(
         self,
         payload: CreateToolBody,
         trans: ProvidesHistoryContext = DependsOnTrans,