Part of what I am doing these days is integrating Red Hat CloudForms / ManageIQ with the Men and Mice IP address management (IPAM) application. In order to reduce gem dependencies, reduce duplication, and handle some architecture issues I have been working on a client gem that uses the JSON-RPC API provided by Men and Mice.
If you are using Ruby and want to integrate with M&M please check out the gem and provide any feedback you have through Github issues.
The gem: https://rubygems.org/gems/mm_json_client
The source: https://github.com/ewannema/mm_json_client