Generally available for ConfiForms form administrators with Confluence admin permissions and for users who are Confluence space admins of the space where this form is located

Direct URL for Cleanup API is: http://confluence_server/confluence/confiforms/cleanup.action?pageId=PAGE_ID

PAGE_ID is the id of the page where ConfiForms form is configured

You can use it to cleanup data stored by ConfiForms plugin, all data or filtered by filter criteria

Same format as for filters is used: ConfiForms Filters

If your confluence server runs in a root context ("/") then the URL will not include /confluence