diff --git a/.env.example b/.env.example
index 67ca835..897d095 100644
--- a/.env.example
+++ b/.env.example
@@ -49,7 +49,7 @@ WAFFO_STORE_SLUG=opsxshell-pwsi6m4n
 WAFFO_PRODUCT_ID=PROD_0pcnzzT4nalEkkcdyIUoD5
 WAFFO_PRODUCT_ID_YEARLY=PROD_2WmkUVoYWt0NN8OVEyC6n3
 WAFFO_PRODUCT_ID_PERPETUAL=PROD_0pcnzzT4nalEkkcdyIUoD5
-WAFFO_CURRENCY=CNY
+WAFFO_CURRENCY=USD
 # test | live（test 时自动附加 test=true）
 WAFFO_ENVIRONMENT=test
 # 支付成功回跳（桌面端 deep link；CreateOrder/Checkout 的 return_url 可覆盖）
diff --git a/backend/internal/controller/order/order_controller.go b/backend/internal/controller/order/order_controller.go
index a5e996d..87ea4e6 100644
--- a/backend/internal/controller/order/order_controller.go
+++ b/backend/internal/controller/order/order_controller.go
@@ -113,6 +113,16 @@ func (ctrl *OrderController) PaymentWebhook(c *gin.Context) {
 	c.JSON(http.StatusOK, gin.H{"code": 0, "message": "Webhook processed"})
 }
 
+// WaffoWebhookReady GET/HEAD probe for dashboard URL checks (browser opens as GET). // Logan.Li
+func (ctrl *OrderController) WaffoWebhookReady(c *gin.Context) {
+	c.JSON(http.StatusOK, gin.H{
+		"code":    0,
+		"message": "waffo webhook ready",
+		"methods": []string{"POST"},
+		"hint":    "Payment events must POST JSON with order_no / orderNo",
+	})
+}
+
 // WaffoWebhook accepts loosely-shaped Waffo payment events and maps to PaymentWebhook. // Logan.Li
 func (ctrl *OrderController) WaffoWebhook(c *gin.Context) {
 	body, err := io.ReadAll(c.Request.Body)
diff --git a/backend/internal/service/payment/waffo.go b/backend/internal/service/payment/waffo.go
index 4bf48ac..64a3bcd 100644
--- a/backend/internal/service/payment/waffo.go
+++ b/backend/internal/service/payment/waffo.go
@@ -31,7 +31,7 @@ func LoadWaffoConfig() WaffoConfig {
 	}
 	currency := strings.TrimSpace(os.Getenv("WAFFO_CURRENCY"))
 	if currency == "" {
-		currency = "CNY"
+		currency = "USD"
 	}
 	defaultProduct := strings.TrimSpace(os.Getenv("WAFFO_PRODUCT_ID"))
 	yearly := strings.TrimSpace(os.Getenv("WAFFO_PRODUCT_ID_YEARLY"))
diff --git a/backend/internal/service/payment/waffo_test.go b/backend/internal/service/payment/waffo_test.go
index 33b7753..9f7c620 100644
--- a/backend/internal/service/payment/waffo_test.go
+++ b/backend/internal/service/payment/waffo_test.go
@@ -11,7 +11,7 @@ func TestBuildCheckoutURL_YearlySubscription(t *testing.T) {
 		StoreSlug:          "opsxshell-pwsi6m4n",
 		ProductIDYearly:    "PROD_2WmkUVoYWt0NN8OVEyC6n3",
 		ProductIDPerpetual: "PROD_0pcnzzT4nalEkkcdyIUoD5",
-		Currency:           "CNY",
+		Currency:           "USD",
 		Environment:        "test",
 		SuccessURL:         "opsxshell://pro/activated",
 	}
@@ -30,7 +30,7 @@ func TestBuildCheckoutURL_YearlySubscription(t *testing.T) {
 	if q.Get("type") != "subscription" {
 		t.Fatalf("type=%s want subscription", q.Get("type"))
 	}
-	if q.Get("currency") != "CNY" {
+	if q.Get("currency") != "USD" {
 		t.Fatalf("currency=%s", q.Get("currency"))
 	}
 	if q.Get("test") != "true" {
@@ -43,7 +43,7 @@ func TestBuildCheckoutURL_PerpetualOnetime(t *testing.T) {
 		StoreSlug:          "opsxshell-pwsi6m4n",
 		ProductIDYearly:    "PROD_2WmkUVoYWt0NN8OVEyC6n3",
 		ProductIDPerpetual: "PROD_0pcnzzT4nalEkkcdyIUoD5",
-		Currency:           "CNY",
+		Currency:           "USD",
 		Environment:        "test",
 		SuccessURL:         "opsxshell://pro/activated",
 	}
diff --git a/backend/router/router.go b/backend/router/router.go
index 78f7b2a..bba80dc 100644
--- a/backend/router/router.go
+++ b/backend/router/router.go
@@ -109,6 +109,7 @@ func SetupRouter(db *gorm.DB, cfg *config.Config) *gin.Engine {
 			register(clientAPI, "POST", "/checkout", orderController.Checkout)
 			register(clientAPI, "POST", "/purchase/claim", orderController.ClaimPurchase)
 			register(clientAPI, "POST", "/webhooks/payment", orderController.PaymentWebhook)
+			register(clientAPI, "GET", "/webhooks/waffo", orderController.WaffoWebhookReady)
 			register(clientAPI, "POST", "/webhooks/waffo", orderController.WaffoWebhook)
 			register(clientAPI, "POST", "/purchase/check", orderController.CheckDuplicatePurchase)
 			register(clientAPI, "POST", "/purchase/status", orderController.CheckPurchaseStatus)