diff --git a/YTKNetwork/YTKBaseRequest.h b/YTKNetwork/YTKBaseRequest.h
index c79fc59..0f405fc 100644
--- a/YTKNetwork/YTKBaseRequest.h
+++ b/YTKNetwork/YTKBaseRequest.h
@@ -332,6 +332,9 @@ typedef void(^YTKRequestCompletionBlock)(__kindof YTKBaseRequest *request);
 ///  This validator will be used to test if `responseStatusCode` is valid.
 - (BOOL)statusCodeValidator;
 
+///  Use this to custom validate with specific error.
+- (BOOL)customValidatorWithError:(NSError * _Nullable __autoreleasing *)error;
+
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/YTKNetwork/YTKBaseRequest.m b/YTKNetwork/YTKBaseRequest.m
index 828b01f..aaa8fc7 100644
--- a/YTKNetwork/YTKBaseRequest.m
+++ b/YTKNetwork/YTKBaseRequest.m
@@ -202,6 +202,10 @@ - (BOOL)statusCodeValidator {
     return (statusCode >= 200 && statusCode <= 299);
 }
 
+- (BOOL)customValidatorWithError:(NSError * _Nullable __autoreleasing *)error {
+    return YES;
+}
+
 #pragma mark - NSObject
 
 - (NSString *)description {
diff --git a/YTKNetwork/YTKNetworkAgent.m b/YTKNetwork/YTKNetworkAgent.m
index dbe24ac..d9ed6cb 100644
--- a/YTKNetwork/YTKNetworkAgent.m
+++ b/YTKNetwork/YTKNetworkAgent.m
@@ -271,6 +271,12 @@ - (BOOL)validateResult:(YTKBaseRequest *)request error:(NSError * _Nullable __au
         }
         return result;
     }
+    
+    result = [request customValidatorWithError:error];
+    if (!result) {
+        return result;
+    }
+
     id json = [request responseJSONObject];
     id validator = [request jsonValidator];
     if (json && validator) {