If you run a dropship or hybrid marketplace model on ERPNext, the native flow runs out of road fast. Stock ERPNext gives you Sales Orders, Purchase Orders, and a "Drop Ship" checkbox on the SO item, but it stops at manually creating one PO per supplier, has no concept of ingesting a supplier's live availability feed, no automatic tracking-number writeback to Amazon/eBay/Shopify, and no guardrail that stops a fulfilment when the supplier's cost has crept above your sell price. In practice that means staff copy-pasting orders into supplier portals, stale stock causing oversells, and margin leaking silently on every third order.

ECOSIRE builds a proper Frappe application — its own module, DocTypes, and hooks — that automates the loop end to end inside ERPNext. When a Sales Order is submitted, a hooks.py on_submit doc event runs server-side logic that resolves each line to the best supplier using your Dropship Supplier Rule DocType (price, availability, region, priority), then auto-creates and optionally submits the matching Purchase Orders — splitting multi-supplier orders automatically. A scheduler event (scheduler_events in hooks.py) polls or receives supplier inventory feeds (CSV/JSON/REST) and updates a Supplier Feed Item DocType so routing decisions and marketplace stock reflect real availability. When a supplier marks a PO shipped, the tracking number is captured and pushed back to the originating channel via the Frappe REST API and whitelisted methods, so the customer and the marketplace get the carrier and tracking without manual entry.

Margin control is enforced, not advisory. A landed-cost guardrail — supplier cost + shipping + duties + fees against the SO price — runs as a server-side validation and can block submission, flag for review, or notify a role, with the thresholds you define per product group or supplier. Client scripts add the operator-facing niceties: a live margin badge on the Sales Order, a "reroute to alternate supplier" action, and status indicators for feed freshness. Permissions and role profiles are wired so buyers, fulfilment staff, and finance each see only what they should, and every automated action is written to the standard Frappe audit trail.

Because this is build-to-order, nothing is a generic download. We start from a short scoping call, map your suppliers, channels, feed formats, and margin policy, and build the app to that. It targets ERPNext / Frappe v15 and v16, ships as a versioned app you own, and is validated on a staging bench against your real order and feed samples before go-live. Typical delivery is 2–4 weeks from confirmed scope, followed by a post-go-live support window and a clean git handover.