httpie Broadsoft authentication plugin to use XSI-SIP (BroadWorksSIP) authentication
$ pip install httpie-xsisip
You should now see xsisip under --auth-type in $ http --help output.
$ http --auth-type=xsisip -a "XSI_ACCOUNT:SIP_ACCOUNT:SIP_PASSWORD" https://xsi-server.example.com/com.broadsoft.xsi-actions/v2.0/versions