You can now use cURL to upload files to transport.oracle.com. cURL is commonly available on most Linux and UNIX systems. "cURL is a computer software project providing a library and command-line tool for transferring data using various protocols. The cURL project produces two products, libcurl and cURL. It was first released in 1997."
To upload a file to a specific service request you can use the below command to do so:
–u “ ” ftps://transport.oracle.com/issue/ /
It is advised to not include the password in your curl command and you will be promoted for it. For more and detailed information you can refer to MOS document: 1547088.2