Marketplace Order Importer & SKU Mapper: Stop Marketplace SKUs From Breaking Fulfillment

The problem this kills

Every marketplace speaks its own language. Amazon, Walmart, eBay, Etsy, Faire, and your own storefront each export orders with their own listing IDs, their own SKU strings, and their own column layouts — and almost none of them match the SKUs your warehouse and ERP actually pick, pack, and count. So someone on your team spends the morning translating: this marketplace listing is really our SKU WID-200-BLK; that "Family Bundle" is actually three different components; this new listing nobody set up yet is a complete mystery.

Do it by hand and you get the slow, expensive failure modes: orders keyed under the wrong SKU, bundles shipped as a single phantom item, inventory counts that drift out of reality, and new listings that quietly fall through the cracks until a customer emails asking where their order is. The mapping work isn't hard — it's just relentless, and it punishes the smallest typo. You do not need to be a developer to build something that does the translating for you and keeps a person in charge of the judgment calls.

What you'll build

A simple internal web tool for your order-entry and ecommerce-ops team. You import a marketplace order-export CSV and a listing-to-SKU crosswalk (your map of marketplace listings to internal SKUs, including how bundles and multipacks break down). The tool matches every order line to your internal SKUs, expands bundles and multipacks into their component SKUs with the right quantities, and flags every listing it can't map — especially brand-new listings — instead of guessing. A reviewer works the flagged list, confirms or fixes the mapping, and only then approves. On approval, the tool creates the orders and exports an ERP-ready CSV in the exact columns your system of record expects, plus an exceptions log of anything it held back.

What's inside the Implementation Plan

The downloadable plan is a step-by-step file you paste into an AI coding agent. It opens by interviewing you about your business — which marketplaces you sell on, the exact columns and listing-ID conventions in each export, how your internal SKUs are named, how your bundles and multipacks break into components, your typical and peak order volumes, and your real rules for when a mapping needs a human to sign off. It reads a short spec back to you for a thumbs-up, then builds the tool around your answers instead of a generic template. From there it walks the agent through the data model, the crosswalk import, the order-export import, the mapping-and-bundle-expansion engine, the unmapped-listing review screen, the human approval gate, and the order-creation and ERP-CSV exports. Every step ends with a ready-to-copy prompt.

The governance it includes (this is the point)

This isn't a toy. The plan builds in the controls a real operation needs: login so only your team can use it, row-level security so people only see their own organization's orders and crosswalk, a complete audit trail of every mapping decision and override (who, what, when, and why), a hard human-approval gate so no orders are created until a person confirms the mapping — especially for new or ambiguous listings — and duplicate guards keyed on the marketplace order ID so the same order can never be imported and created twice. The whole tool exists to make a careful human decision easy: the AI proposes the mapping, a person approves it, and only then does anything get written.

Who it's for

Ecommerce operations leads, order-entry teams, and fulfillment coordinators who juggle orders from several marketplaces and are tired of hand-translating SKUs and chasing bundle math. If you can describe how your marketplace listings map to your internal SKUs — and how your bundles come apart — you can build this.

You've got this — open the plan, paste the first prompt, and you'll be importing and mapping your first real marketplace batch this weekend.