I built an MVP to solve the global "Wrong Size" problem in online shopping. Looking for feedback! 🌍

Hi Indie Hackers!

I'm a student founder from India and I’ve been obsessed with the problem of returns in e-commerce due to incorrect sizing. It's a billion-dollar waste globally.

I built NEXA — a simple tool that generates a "Fit ID" based on body measurements. The goal is to make a universal sizing standard so people never have to worry about "will this fit me?" regardless of the brand.
What I've built so far:

A basic MVP that takes measurements and stores a unique Fit ID.

A front-end built with HTML/CSS.

What I need help with:

How can I make this "Fit ID" integrate better with global e-commerce platforms like Shopify?

What features should I add to make it more "trustworthy" for international users?

I’m from a Tier-4 college and trying to build this into something global. Any feedback or advice from experienced founders here would mean the world to me!

Check it out here: [https://github.com/d7755911-prog/nexa-live-fit.git]