It is possible to access your USS allocation through an S3 API, however, a request must be made for the gateway to be provisioned. The following pages are intended to provide examples for how you may might interact with the S3 API and access your storageeither via a graphical user interface, command line interface, or from a python script:
What is the difference between USS S3 and SDSC Cloud Storage?
Please see the FAQ answer on the What is the difference between SDSC Cloud Storage and USS S3? page.