You can use the Seven Bridges API R client and the Seven Bridges Python library below to talk to the CAVATICA API.
R
The Seven Bridges API R client is available on Github and Bioconductor.
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.
Python
The Seven Bridges API Python client for the API is available from the Python Package Index at https://pypi.python.org/pypi/sevenbridges-python. Documentation is available at Readthedocs.
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/