SYSPRO and PayPal integration

What moves between them

The integration flows from PayPal into SYSPRO. After a PayPal transaction or order completes, ml-connector polls the PayPal transaction search and orders API, maps the customer email to a SYSPRO customer record, and creates or updates invoices and payment postings in SYSPRO's accounts receivable and general ledger. Price lists and customer records are synced on a schedule so PayPal order details match SYSPRO inventory and pricing. Refunds issued in PayPal flow back into SYSPRO as negative invoices or credit memos, allocated to the same GL account as the original sale. The flow is one-way into SYSPRO because SYSPRO is the financial source of truth; orders and payments are not written back to PayPal.

How ml-connector handles it

ml-connector stores SYSPRO session credentials and PayPal OAuth Client ID and Secret encrypted at rest. On each run, it requests a fresh SYSPRO session token (or reuses one if not expired), requests a fresh PayPal bearer token (reusing it across calls within its lifetime), and polls PayPal's transaction search and orders APIs using a date filter to fetch only new records since the last poll. For each PayPal order or transaction, ml-connector looks up the matching SYSPRO customer by email address; if not found, it creates a new customer record using the PayPal payer details. It then creates an invoice in SYSPRO with the order line items mapped to SYSPRO inventory master records by SKU, and posts the payment amount to the accounts receivable GL account. Refunds are handled as credit-memo postings to the same GL account. Because PayPal transactions are queryable only within a 31-day window, ml-connector stores a high-water mark of the last processed transaction timestamp and never re-processes the same PayPal transaction ID. SYSPRO OData writes require switching to e.net Business Objects API with write permissions, which must be pre-enabled in Operator Maintenance; ml-connector validates this on startup. PayPal rate limits are returned as HTTP 429 and ml-connector backs off exponentially. Every posting carries a full audit trail with the PayPal transaction ID and order ID.

A real-world example

A mid-sized online retailer uses SYSPRO for warehousing, distribution, and accounting, and sells through their own site and PayPal's marketplace platform. Before integration, the order fulfillment team exported orders and payments from PayPal every day and re-entered them into SYSPRO by hand, then spent days at month-end reconciling cash receipts in the bank to revenue in SYSPRO and tracking down missing invoices. With SYSPRO and PayPal connected, each PayPal transaction flows into SYSPRO as an invoice and payment posting, mapped to the customer and inventory master automatically. The accounts receivable aging is live, cash reconciliation is instant, and month-end close no longer requires manual matching between PayPal exports and SYSPRO ledgers.

What you can do

• •Sync PayPal orders into SYSPRO as customer records and sales orders, mapped to existing inventory by SKU.
• •Post PayPal transactions into SYSPRO as invoices and payments allocated to accounts receivable and GL.
• •Poll PayPal transaction search API on a schedule and create invoice and payment postings in SYSPRO without re-entry.
• •Authenticate SYSPRO with session tokens and PayPal with OAuth 2.0 bearer tokens, managing token refresh and expiry.
• •Handle PayPal refunds as credit-memo postings in SYSPRO and track every transaction with a full audit trail.

Questions

Which direction does data move between SYSPRO and PayPal?

The main flow is PayPal into SYSPRO. Customer orders, transactions, and refunds from PayPal flow into SYSPRO as invoices, payments, and credit memos, mapped to SYSPRO customer and inventory records. Price lists and customer master records are synced in both directions to keep PayPal pricing aligned with SYSPRO. PayPal is not written to; SYSPRO is the source of truth for financial records.

How does the integration handle SYSPRO's lack of webhooks and PayPal's 31-day transaction window?

ml-connector polls PayPal's transaction search and orders APIs on a schedule you define, using a high-water mark timestamp to fetch only new records since the last poll. Because PayPal transaction history is limited to a 31-day rolling window, ml-connector stores the highest transaction ID it has processed to avoid re-processing the same transaction if the schedule drifts. SYSPRO itself has no outbound webhooks, so polling is the only viable pattern on both sides.

What authentication setup is required on each side?

SYSPRO requires an operator account with e.net security permissions enabled in Operator Maintenance (for write operations). ml-connector logs in using that operator's credentials to obtain a session token, which is cached and refreshed before expiry. PayPal requires a REST app created in the Developer Dashboard with a Client ID and Client Secret; ml-connector exchanges those credentials for an OAuth bearer token on each run and reuses it across multiple calls within its lifetime.