diff --git a/axhub-gateway/src/main/resources/static/index.html b/axhub-gateway/src/main/resources/static/index.html
index aa472cd..5b13b7e 100644
--- a/axhub-gateway/src/main/resources/static/index.html
+++ b/axhub-gateway/src/main/resources/static/index.html
@@ -310,7 +310,7 @@
 
                 const groupedTools = {};
                 tools.forEach(tool => {
-                    const group = tool.domainGroup || '기타 그룹';
+                    const group = tool.categoryKey || '기타 그룹';
                     if (!groupedTools[group]) {
                         groupedTools[group] = [];
                     }
diff --git a/axhub-gateway/src/main/resources/static/playground.html b/axhub-gateway/src/main/resources/static/playground.html
index 78f9a51..c934c8f 100644
--- a/axhub-gateway/src/main/resources/static/playground.html
+++ b/axhub-gateway/src/main/resources/static/playground.html
@@ -314,7 +314,7 @@
                 
                 const groupedTools = {};
                 tools.forEach(tool => {
-                    const group = tool.domainGroup || '기타 그룹';
+                    const group = tool.categoryKey || '기타 그룹';
                     if (!groupedTools[group]) groupedTools[group] = [];
                     groupedTools[group].push(tool);
                 });