Teams in Australia, New Zealand, and the UK often standardise their financial filing on Xero because that is where their accountant, BAS/GST agent, or bank feeds already live — but they run sales, purchasing, inventory, and projects in ERPNext. ERPNext has no native Xero connector, so the gap gets bridged by hand: someone re-keys Sales Invoice and Purchase Invoice records into Xero, reconciles payments twice, and hopes the two contact lists and account codes never drift. At month-end that manual bridge is exactly where numbers stop matching and the close slips.

ECOSIRE builds a dedicated Frappe app — a proper installable app with its own module, DocTypes, and hooks.py wiring — that connects your ERPNext site to the Xero Accounting API over OAuth2. We model the integration as first-class ERPNext data: a Xero Settings single DocType holds the tenant connection and token refresh, Xero Account Mapping and Xero Tax Mapping child tables pin your ERPNext chart of accounts and tax templates to their Xero equivalents, and a Xero Sync Log DocType records every push/pull with the remote Xero ID, direction, payload hash, and error detail so nothing syncs blind. Documents flow through hooks.py doc events (on_submit, on_cancel) that enqueue background jobs via frappe.enqueue, plus a scheduler event that runs periodic pulls and retries failed items — so a Xero outage never blocks an ERPNext submission.

The sync covers the accounting objects that actually reconcile: ERPNext Sales Invoice and Purchase Invoice map to Xero invoices and bills; Payment Entry records feed Xero payments and align to the bank reconciliation view; Customer and Supplier map to Xero contacts with a stable external-ID link on both sides so you never create duplicates. Chart-of-accounts and tax mapping is explicit and reviewable, tracking categories map to ERPNext dimensions (cost centre, project, or a custom field you nominate), and idempotency is enforced on the Xero ID so a retried job updates rather than double-posts. We expose whitelisted methods (@frappe.whitelist()) for a manual "sync now" action and a reconciliation report, guard them with a dedicated role profile so only finance users can trigger or remap, and add client scripts to surface sync status and the Xero link right on the invoice form.

Because this is built to your scope, we start from your real chart of accounts, tax setup, and the exact objects and direction you need — not a lowest-common-denominator marketplace app. You get the source code for your version, targeting Frappe/ERPNext v15 with a v16-ready path, plus a git repo you own. Typical delivery is one working week from confirmed scope: we book a short scoping call, agree the field-level mapping and conflict rules, build against a staging copy of your site, run UAT with your finance team, then install on production with a rollback plan and a post-go-live support window. No instant download — we build it, install it, and stand behind it.