src/InterfaceForward.Application/Services/Interface/InterfaceService.cs

@@ -108,7 +108,10 @@ public class InterfaceService : ApplicationService
 
         // 构造参数
         var paras = await InterfaceRepository.GetParameterListByIdAsync(id);
-      
+        // 上游入参树；下游改走 requestBody / mappingBody，不再填 inParameterList
+        res.InParameterList = interfaceEntity.IsUpStream
+            ? paras.Where(x => x.IsInPara).ToList()
+            : [];
         res.RequestBodyParameterList = !interfaceEntity.IsUpStream && interfaceEntity.ContentType is ContentType.Json or ContentType.Xml
             ? paras.Where(x => x.IsInPara && x.ParaKind == ParameterParaKind.Normal).ToList()
             : [];