bscli is a command line interface for the BetaSeries web site.
It started as an experiment with the Cobra package to write a CLI utility Go.
It uses the BetaSeries REST API and the bs-client Golang library (slightly modified).
The autogenerated manual pages are online there (you might want to browse the html version).
You can also use the built-in help command.
You can get some pre-built binaries available for different OSes/platforms here.