Fashion and lifestyle sellers on Shein Marketplace live in two systems that do not talk to each other. Orders land in the Shein seller portal while your stock, costing, purchasing and accounting live in ERPNext — so someone re-keys every order into a Sales Order, manually decrements stock, and reconciles payouts by hand. ERPNext ships no native Shein integration: its stock ledger, Item variants and Sales Invoice engine are exactly what you want, but out of the box there is no bridge to pull Shein orders in or push inventory and price back out. As volume grows, the manual gap becomes oversells, stale listings, mispriced SKUs and returns that never get recorded against the right batch.

ECOSIRE builds a proper Frappe app — its own module, DocTypes and hooks.py — installed directly on your ERPNext bench, not a fragile external middleware. A dedicated Shein Settings DocType holds your API credentials (encrypted), warehouse and price-list mappings, and sync toggles. Scheduler events poll Shein for new and updated orders and write them as ERPNext Sales Orders (optionally auto-creating the Delivery Note and Sales Invoice), mapping each Shein variation to the correct ERPNext Item and variant via a Shein Listing Map DocType. Inventory and price move two ways: a Stock Ledger Entry on_update doc event pushes available quantity back to Shein within your configured buffer, and price-list changes propagate to the matching listing. Whitelisted methods expose safe REST endpoints for the webhook/callback traffic Shein sends, and every call is written to a Shein Sync Log DocType so failures are visible and replayable rather than silent.

The connector handles the full order lifecycle a marketplace seller actually needs: listing and variation push (create/update SKUs, sizes, colors and images from ERPNext Item masters), shipping and tracking writeback so a carrier and tracking number entered on the ERPNext Delivery Note posts back to Shein and closes the fulfilment, and returns/refund mapping so a Shein return becomes an ERPNext Sales Return (credit note) against the original invoice and correctly re-stocks inventory. Client scripts add the marketplace context inside the ERPNext desk — a "Sync to Shein" button on the Item, live sync status on the order — while role profiles and permission rules keep marketplace operators scoped to what they should touch. Everything targets Frappe/ERPNext v15 and v16 and is written to survive bench update.

Because this is built to order, nothing is a black box. We start with a scoping call to map your Shein catalog, warehouses, tax and price-list structure, then build against your real data on a staging bench. You get the installable source for your version, a git repository handover, UAT sign-off before go-live, and a support window after launch. Typical delivery is one working week from confirmed scope, depending on how many SKUs, warehouses and edge cases (bundles, multi-warehouse allocation, partial returns) are in play.