diff --git a/common/types.go b/common/types.go
index be2ce38..bff22ae 100644
--- a/common/types.go
+++ b/common/types.go
@@ -135,7 +135,7 @@ func init() {
 	DtmConfig.DB = map[string]string{
 		"driver":   os.Getenv("DB_DRIVER"),
 		"host":     os.Getenv("DB_HOST"),
-		"port":     os.Getenv("DB_PORT"),
+		"port":     dtmcli.OrString(os.Getenv("DB_PORT"), "3306"),
 		"user":     os.Getenv("DB_USER"),
 		"password": os.Getenv("DB_PASSWORD"),
 	}
diff --git a/dtmsvr/api.go b/dtmsvr/api.go
index 11d06ca..d49819f 100644
--- a/dtmsvr/api.go
+++ b/dtmsvr/api.go
@@ -12,6 +12,7 @@ import (
 )
 
 func addRoute(engine *gin.Engine) {
+	engine.GET("/api/ping", common.WrapHandler(func(c *gin.Context) (interface{}, error) { return "OK", nil }))
 	engine.POST("/api/dtmsvr/prepare", common.WrapHandler(prepare))
 	engine.POST("/api/dtmsvr/submit", common.WrapHandler(submit))
 	engine.POST("/api/dtmsvr/registerXaBranch", common.WrapHandler(registerXaBranch))