I wasn't clear as to whether there should be an administration interface available after the installation, for example https://sitebuilder.HOSTNAME/admin. Is there any URL that would log me in and provide some form of overview of the system, or is the API the only interaction available with the software?
There is no administrative interface of Parallels Presence Builder to overview the system.
If you want to make sure that installation completed successfully, visit the editor in the trial mode and create a trial site by accessing the URL like http://sitebuilder.HOSTNAME/Try. You can find out the exact host name and IP address and by issuing the command apachectl -S.
Additionally, to ensure that the Presence Builder Standalone installation is accessible by the domain name sitebuilder.HOSTNAME, check and correct the DNS zone settings.
It is also possible to retrieve the Software Version via API. Use the following links below to get more information: