Integration with CollectiveAccess is possible by combination of the following 2 modules:
This module provides the ability to retrieve data from your CollectiveAccess collection management system (http://www.collectiveaccess.org), using Drupal as a frontend to make (parts of) your collection available to the public.
This is mainly an utility module that allows you to manage connection to CollectiveAccess installation(s).
This module integrates the CollectiveAccess & Feeds modules, to allow you to retrieve data from CollectiveAccess and import them into Drupal nodes, entities, users, ...
Please read the project pages for more information, and the README.txt files that come with the modules.