Which direction does data move between SYSPRO and AvidXchange?

Invoices and purchase orders move from SYSPRO to AvidXchange for approval and workflow routing. Supplier master records are also synced to keep vendor lists in agreement. After payment execution in AvidXchange, payment status and posting data flow back into SYSPRO as GL transactions, so the invoice is posted once and the AP ledger stays reconciled.

How does the integration handle SYSPRO's lack of webhooks and session token expiry?

ml-connector polls SYSPRO OData tables on a schedule you set (typically 10 minutes) rather than waiting for a push, reading ApSupplier, ApInvoice, and PorMasterHdr with timestamp filters. Session tokens are refreshed by calling the Logon endpoint before expiry to avoid interruption. Because OData is read-only, writes use the e.net Business Objects XML API instead.

Does SYSPRO require special setup for the integration to work?

Yes. The operator account must have e.net security permissions enabled in Operator Maintenance, and the OData password must be generated in SYSPRO settings. ml-connector uses HTTP Basic Auth for OData reads and e.net session token for writes, storing both credentials encrypted. You supply your own SYSPRO server URL since there is no shared SaaS base URL.

SYSPROAvidXchange

SYSPRO and AvidXchange integration

SYSPRO runs manufacturing and distribution finance. AvidXchange automates accounts payable from invoice receipt through payment. Connecting the two keeps your vendor master and invoice workflow in sync without manual data entry. Approved invoices coded in SYSPRO flow into AvidXchange's approval chain, and payment execution posts back into SYSPRO's general ledger. ml-connector bridges the different authentication schemes on each side and moves records on a schedule you control.

How SYSPRO works

SYSPRO (versions 8 cloud and on-premise) exposes suppliers, purchase orders, invoices, GL accounts, and posting records through two API layers. e.net Business Objects supports REST and SOAP reads and writes with a session token obtained by login to the Logon endpoint, returning a UserId GUID that must be passed on all subsequent calls. OData provides read-only REST access to all tables using HTTP Basic Auth with an operator code and a separate OData password. SYSPRO publishes no shared SaaS hostname, so each customer supplies their own server URL. Session tokens expire on logoff or timeout, and large XML payloads are sent via NetTcp SOAP instead of REST due to URL length limits. SYSPRO does not publish outbound webhooks, so data is read by polling at 5 to 15 minute intervals.

How AvidXchange works

AvidXchange exposes vendors, invoices, purchase orders, payments, GL accounts, and accounting dimensions through the AvidConnect REST API, available to registered partners and ERP integrators. Authentication uses OAuth 2.0 client credentials (client_id, client_secret, company_id) issued after onboarding. The API gateway is WSO2 API Manager, and each partner receives production and sandbox base URLs during registration. Full endpoint documentation and the OpenAPI specification are available only through the AvidXchange Partner Portal, not published publicly. AvidXchange supports scheduled batch sync only; no outbound webhooks or push notifications are available, so the connector must poll for payment completions and status updates.

What moves between them

The main flow moves purchase orders and supplier invoices from SYSPRO into AvidXchange's approval workflow. Supplier master records are sent to AvidXchange as vendors, and GL coding from SYSPRO invoices maps to AvidXchange accounting dimensions. After approval and payment execution in AvidXchange, payment status and remittance data are read back and posted as transactions into SYSPRO's general ledger on a daily or end-of-day cadence. GL account and cost center mappings are aligned before the first sync so all posting lines land on valid SYSPRO dimensions.

How ml-connector handles it

ml-connector maintains two credential sets: a UserId GUID and session token for SYSPRO e.net, refreshed by polling the Logon endpoint before token expiry, and OAuth 2.0 client credentials for AvidXchange, stored encrypted. On the SYSPRO side, the connector polls OData tables (ApSupplier, ApInvoice, PorMasterHdr) with timestamp filters on PostDate and InvoiceDate at 10-minute intervals, converting OData read-only results to e.net XML when a write is required. Because SYSPRO has no webhooks, the connector does not wait for a push; instead, it reads all purchase order and invoice records scheduled for approval, transforms them to AvidXchange format, and posts them via the partner OAuth endpoint. AvidXchange rate limits and requires company_id in every request, so ml-connector caches the OAuth token per company, backs off on 429 responses, and tracks token expiry. Payment postings from AvidXchange are validated against the original SYSPRO invoice before posting to avoid mismatched GL accounts. Every record carries a transaction ID for audit trail and replay.

A real-world example

A mid-sized electronics distributor runs SYSPRO ERP across three warehouses and a central finance office, and uses AvidXchange to manage the approval workflow for 8,000 monthly invoices from 200 suppliers. Before the integration, the AP team received invoices in AvidXchange, approved them, and then printed the approval list and manually entered GL coding into SYSPRO by hand to post the invoices, creating duplicate effort and frequent coding errors. With SYSPRO and AvidXchange connected, invoice records and supplier codes flow automatically from SYSPRO into AvidXchange's workflow, approval routing stays in AvidXchange, and payment status flows back into SYSPRO as GL postings. The AP team codes invoices once in AvidXchange, and the posting happens automatically, eliminating the re-entry step and reducing month-end reconciliation time by half.

What you can do

Sync SYSPRO purchase orders and invoices to AvidXchange via scheduled OData polling, with GL account mapping.
Keep SYSPRO supplier master records aligned with AvidXchange vendors so new suppliers are available in both systems.
Post AvidXchange payment completion and remittance data back into SYSPRO general ledger as AP transactions.
Authenticate SYSPRO using session token from e.net Business Objects and AvidXchange using OAuth 2.0 client credentials.
Maintain a full audit trail with transaction IDs for every invoice sent, approval state received, and payment posted.

Questions

Which direction does data move between SYSPRO and AvidXchange?: Invoices and purchase orders move from SYSPRO to AvidXchange for approval and workflow routing. Supplier master records are also synced to keep vendor lists in agreement. After payment execution in AvidXchange, payment status and posting data flow back into SYSPRO as GL transactions, so the invoice is posted once and the AP ledger stays reconciled.
How does the integration handle SYSPRO's lack of webhooks and session token expiry?: ml-connector polls SYSPRO OData tables on a schedule you set (typically 10 minutes) rather than waiting for a push, reading ApSupplier, ApInvoice, and PorMasterHdr with timestamp filters. Session tokens are refreshed by calling the Logon endpoint before expiry to avoid interruption. Because OData is read-only, writes use the e.net Business Objects XML API instead.
Does SYSPRO require special setup for the integration to work?: Yes. The operator account must have e.net security permissions enabled in Operator Maintenance, and the OData password must be generated in SYSPRO settings. ml-connector uses HTTP Basic Auth for OData reads and e.net session token for writes, storing both credentials encrypted. You supply your own SYSPRO server URL since there is no shared SaaS base URL.

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