I loved geocities too, and I always wished I"d had a CORS backend to call from my HTML pages. I built a service specifically to be a CORS backend for neocities. You can signup, and start making CORS calls from your neocities pages to a sqlite database on my service. I tried several times to contact the owner of neocities about this but he never responded. Since then I implemented static file hosting and pivoted to a "Single Page App One Stop Shop" model. We offer custom domains and free ssl (Lets Encrypt) for early adopters. Link in my profile.