Question regarding posting listing and revising

I have multiple accounts, and mostly I do sell similar items on both accounts. I use GarageSale to manage my both accounts. I don’t want my accounts to be linked together. I know that accounts could be linked by same IP address. So my question is, when I post a new listing or revising listing, does the information submitted directly to an eBay or it goes through your servers?
Thank you


GarageSale does connect directly to eBay when it uses your eBay token.