Hey @jsharkey
You can find a full list of Pro Reports tokens in this KB:
And more information about Tokens and their use under the “Create Custom Report Templates” section of this KB:
More information about creating custom tokens can be found in this post: [Extension Request] Clients Reports and Pro Client Reports: Report Tokens for iThemes Security
The example given there was for the custom iThemes Security token, but the same logic applies to data from other plugins.