NetSuite and SAP both expose their PO and goods receipt data through REST APIs that allow external automation systems to query the data needed for 3-way matching. The implementation pattern is consistent: configure the API credentials in n8n, build the PO lookup node that queries NetSuite or SAP using the PO number extracted from the invoice, build the goods receipt lookup node, and pass both records to the AI matching component alongside the invoice data.
NetSuite Integration
NetSuite's SuiteTalk REST API supports searching purchase orders by PO number and retrieving the associated item receipts. The n8n HTTP Request node makes these queries using OAuth 2.0 authentication. The returned PO data includes line items, approved quantities, and unit prices. The receipt data includes received quantities by line item and receipt date.
SAP Integration
SAP's REST API for materials management exposes purchase order and goods receipt data through the procurement API endpoints. The integration pattern is similar to NetSuite — query by PO number, retrieve line item and quantity data, pass to the matching component. SAP integration requires API key authentication and may require configuration of the API access permissions through SAP Basis.
The Accounts Payable 3-Way Match AI Agent includes pre-built integration modules for both NetSuite and SAP, reducing the ERP integration setup to a configuration step rather than a development project.