This module is basically for validation purpose. you can put the field name of content type for regular expression to prevent special character, numeric value and so on.
1.> Enable the module
2.> Go to configuration link
3.> Add the content type field name
4.> then go to add content link and see you validation
This Clockwise.MD API module is for connecting and calling their API. It is a simple module, but it gives you a method and a class to work with to call the API to get results.