PKI Certificate for authentication

We are building a test suite for our APIs, which require authentication via a PKI certificate in order to access them. Does anyone know of a method to add a certificate to the Katalon API request, either through the UI or via a groovy script? We really want to move our testing framework to Katalon, but this is preventing us from using it. Thanks!

I wrote a custom python script which works. You can call it from groovy system command. It changes the Firefox profile or removes all windows certificates from your machine and adds the one you specify. A little hack, but it works!