Rclone is a command line program to manage files on cloud storage.
Making siad available as a backend for rclone has been an ongoing project for years and some headway has been made via this pull request:
The contributor @Sevey is currently unable to continue advancing this but has offered to give detailed information to anybody willing to pick this up.
Getting sia supported by rclone would offer huge exposure and make affordable cloud storage available for prosumers and small businesses.
Please consider adding this feature to the road map. I would propose an external contractor or a bounty if no foundation developer is available to pick this up.