As you are using a third-party for API, and as you state above, this is not going through Netlify, but directly to them from your computer. You are not using Netlify functions for API, or proxying through Netlify to a backend. I am not sure how you think this is an issue with Netlify.
Completely unrelated…
I also see your site sistema.kitnetbar.com.br is proxying through Cloudflare. See [Support Guide] What problems could occur when using Cloudflare in front of Netlify?
I also see you have not disabled source maps (see GENERATE_SOURCEMAP.)
I also see the domains kitnetbar.com.br and www.kitnetbar.com.br are both inaccessible with an Origin is unreachable from Cloudflare. Is this intentional?