diff --git a/openapi/charge/interface.proto b/openapi/charge/interface.proto
index af80768..43e866b 100644
--- a/openapi/charge/interface.proto
+++ b/openapi/charge/interface.proto
@@ -117,6 +117,7 @@ message CreateMarginReq {
 message CreateMarginResp {
   bool done = 1;
   string msg = 2;
+  string marginId = 3;
 }
 
 // 更新接口余量请求
diff --git a/openapi/core_api/common.proto b/openapi/core_api/common.proto
index 5fb5290..6a63ca2 100644
--- a/openapi/core_api/common.proto
+++ b/openapi/core_api/common.proto
@@ -151,7 +151,6 @@ message CreateFullInterfaceReq {
   string userId = 2;             // 面向用户id
   charge.ChargeType chargeType = 3;     // 收费模式
   int64 price = 4;               // 接口单价
-  int64 margin = 5;              // 接口余量
 }
 // 更新完整接口请求(不包括余量)
 message UpdateFullInterfaceReq {