How to get XCAD code?

Excuse me, could you please elaborate on the process of obtaining the XCAD code? I'm quite interested in understanding the steps involved, as I'm new to this area. Is there a specific platform or website where I can access it? Are there any prerequisites or requirements that I need to fulfill before I can get my hands on the XCAD code? Additionally, is there a fee associated with obtaining the code, and if so, how much is it? I'd appreciate any guidance or insights you can provide on this matter.