diff --git a/.well-known/metagpt_oas3_api.yaml b/.well-known/metagpt_oas3_api.yaml
index 4999bf38a..7a0058b50 100644
--- a/.well-known/metagpt_oas3_api.yaml
+++ b/.well-known/metagpt_oas3_api.yaml
@@ -5,6 +5,11 @@ info:
   version: "1.0"
 servers:
   - url: "/oas3"
+    variables:
+      port:
+        enum:
+          - '8080'
+        default: '8080'
 
 paths:
   /tts/azsure: