Multi-Channel Inventory Sync for Ecommerce (Shopify, Amazon, eBay) Designed and built a system for stores selling across multiple channels to stop losing time and money to manual listing updates and stock mismatches.

The problem: every store selling on more than one platform hits the same wall. A new product means retyping the title, description, and pricing into Shopify, then again into Amazon, then again into eBay, three separate chances to make a mistake, and three places that can quietly go out of sync.

What it does:

Catches new products the moment they go live on Shopify

Rewrites listing copy to fit how Amazon and eBay actually rank and display listings, not just copy-pasted

Routes every draft through a Slack approval step before anything publishes

Keeps stock counts synced across all channels on a schedule

Runs a daily reconciliation pass that independently checks for drift and alerts if something's off

Three separate, focused pipelines (listing sync, stock sync, reconciliation), all reading from and writing to one shared data table, so nothing gets duplicated or contradicted between them.

Built with: n8n, Supabase, AI for listing rewrites, Slack for approvals

Available for: ecommerce stores or agencies managing multi-channel listings who want this templated to their own stack

Testing my app! 🧰🚀 Everything is finally coming along.

I’ve been working on this project for a little over two weeks. Initially it was just me working with one AI agent, but I was still manually coding most of it, so I was moving like a turtle 🐢very slow.

Then I decided to implement Codex into my project to automate more of the development and it has been amazing. Now I can focus more on prompting, testing, reviewing the code and making the technical decisions instead of manually coding everything.

I also created my own AGENTS.md bible with all my project rules and instructions to make sure Codex follows them as the final authority when working on my code.

The idea is simple: create one useful and intuitive ecosystem of tools that Shopify merchants can add to their stores to help customers make purchasing decisions faster and with more confidence.

Still testing, building and adding more tools. Let’s see where this goes! 🚀

And if anyone finds the idea interesting. I’m definitely open to collaborations, ideas or partnerships. Feel free to reach out!

Seeing you shift from hand coding to Codex and let the agent handle the grunt work really speeds up iteration.