The OP says 0% fees here you say 0.2%: https://fryx.finance/api is that just for the API?
If it's open source where is the source? No link on the site. Have not had my coffee yet so have not looked deeply for a link.

It looks like it's running in the Google cloud, opinion here and nothing more but I would move it to a more privacy friendly host.
If I am wrong ignore that line.

-Dave