security testing tools which use Ruby as there primary language and can be automated to fit into a jenkins build process?

My daily job is automation engineer I work on API testing and front end testing with selenium, however, the company I work for have asked me to look into some security testing, I use ruby as my primary language for coding, What security testing tools are available for this language? Are there any frameworks which open in an IDE such as rubymine which can also be fitted into an automated build process using jenkins CI? The reason i am asking is a simple google search doesn't seem to return anything useful apart from penetration testing scanners which all seem to have a subscription fee. I use Jenkins currently for automating API tests and front end selenium tests. It would be ideal if I could find some sort of security testing framework which could also be fitted into the CI.

Any help would be much appreciated.