Supplier Feed Stock Sync is a build-to-order Shopify app for resellers and distributors who carry stock from several suppliers and are tired of manually editing inventory and prices. After purchase, ECOSIRE builds and installs a private app tailored to your feeds — then keeps it running.

The app ingests supplier data wherever it lives: a CSV or XML file on FTP/SFTP or HTTPS, a shared Google Sheet, or a vendor REST/JSON API. On a schedule you set (hourly, nightly, every 15 minutes), it parses each feed, maps the supplier's columns to Shopify fields, matches rows to your variants by SKU (with barcode/UPC fallback), and writes updated inventory quantities and prices through the Shopify Admin GraphQL API.

Because it uses the official inventorySetQuantities and productVariantsBulkUpdate mutations, it respects multi-location inventory — you decide which supplier maps to which Shopify location. When a SKU disappears from a feed or drops to zero, the app can set quantity to 0 or flag it, so you never oversell.

Each supplier gets its own field mapping and SKU-matching rules, and multi-supplier consolidation lets the same variant draw from more than one feed (sum quantities, or prefer the lowest price). Every run produces a change report — rows updated, rows skipped, unmatched SKUs, price deltas, and parse errors — delivered by email or stored in app metafields for audit.

This is honest build-to-order: there is no instant App Store download. ECOSIRE scopes your feeds, builds the connector, installs it on your store via OAuth, validates a real sync run with you, and provides ongoing support. Typical delivery is 5–10 business days depending on feed count and complexity.