diff --git a/axhub-gateway/src/main/resources/application.properties b/axhub-gateway/src/main/resources/application.properties
index 58dcf30..bed22e9 100644
--- a/axhub-gateway/src/main/resources/application.properties
+++ b/axhub-gateway/src/main/resources/application.properties
@@ -41,6 +41,8 @@ mcp.max-stream-bytes=1048576
 mcp.max-response-bytes-from-tool=5242880
 mcp.tool-registry-sync-interval-millis=5000
 
+# API 보안 키 설정
+mcp.security.tenant-domains.TESTER-DEV=ALL
 # Spring AI OpenAI / Gemini API Config
 spring.ai.openai.api-key=AQ.Ab8RN6KFZggsQf8iooY1v_3h3vp2TIjiYB54dV4Yay3vVKEMtg
 spring.ai.openai.base-url=https://generativelanguage.googleapis.com/v1beta/openai/