diff --git a/docs/performance/tune-performance/threading.md b/docs/performance/tune-performance/threading.md
index 18620eb4add9f..2b546422c080c 100644
--- a/docs/performance/tune-performance/threading.md
+++ b/docs/performance/tune-performance/threading.md
@@ -201,5 +201,7 @@ int main() {
 
 Note that `CreateThreadCustomized` and `JoinThreadCustomized`, once  set, will be applied to both ORT intra op and inter op thread pools uniformly.
 
+## Usage in custom ops
+Since 1.17, custom op developers are entitled to parallelize their cpu code with ort intra-op thread pool.
 
-
+Please refer to the [API](https://github.com/microsoft/onnxruntime/blob/rel-1.17.0/include/onnxruntime/core/session/onnxruntime_c_api.h#L4543), and [example](https://github.com/microsoft/onnxruntime/blob/rel-1.17.0/onnxruntime/test/testdata/custom_op_library/cpu/cpu_ops.cc#L87) for usage.
\ No newline at end of file
diff --git a/docs/reference/operators/add-custom-op.md b/docs/reference/operators/add-custom-op.md
index 0cb3626efb38f..b4b43b2324eb5 100644
--- a/docs/reference/operators/add-custom-op.md
+++ b/docs/reference/operators/add-custom-op.md
@@ -133,7 +133,7 @@ void KernelOne(const Ort::Custom::CudaContext& cuda_ctx,
   cuda_add(Z.NumberOfElement(), z_raw, X.Data(), Y.Data(), cuda_ctx.cuda_stream); // launch a kernel inside
 }
 ```
-Details could be found [here](https://github.com/microsoft/onnxruntime/tree/rel-1.16.0/onnxruntime/test/testdata/custom_op_library/cuda).
+Full example could be found [here](https://github.com/microsoft/onnxruntime/tree/rel-1.17.0/onnxruntime/test/testdata/custom_op_library/cuda). To further facilitate development, a wide variety of cuda ep resources and configurations are exposed via CudaContext, please refer to the [header](https://github.com/microsoft/onnxruntime/blob/rel-1.17.0/include/onnxruntime/core/providers/cuda/cuda_resource.h#L8) for detail.
 
 For ROCM, it is like: