You could attempt to get access to a CUDA 10 early access version to see if such an API is provided
Once you have access rights in your developer account, the early access information can be found here https://developer.nvidia.com/cuda-early-access
The early access program is by invitation only, I do not know if the above link allows applying for access if you don’t already have permissions.
I also find this legal blurb on said web page: "Access to the EA program is restricted. So please remember that by participating in this program, you agree not to share any binaries or documentation and you must not discuss this program or any details of the features, functionality or performance on any public forums or with other developers. You may discuss any technical issues with your NVIDIA Contact or use the bug submission form below for technical questions, feedback, bugs, issues and feature requests.
Being part of the EA program gives you the unique opportunity to directly influence the quality and performance of the final production version of the CUDA Toolkit. You are encouraged to try out the new features and provide us feedback. We expect that you will compile your current applications with the new toolkit and report any functional and performance changes including improvements and any regressions to us."
This pretty much says that you cannot publicly disclose your findings about CUDA 10 yet if obtained from/through the Early Access software.
there is an even longer version (PDF) here: