You can use the Seven Bridges API R client and the Seven Bridges Python library below to talk to the CAVATICA API.
This is an open-source project, and the the code is openly available on Github.
Please report any issues to https://github.com/sbg/sevenbridges-r/issues.
The code is available on Github at https://github.com/sbg/sevenbridges-python
Make sure you set your environment variable to match the CAVATICA API path: https://cavatica-api.sbgenomics.com/v2/