PunchOutHub gives you a production-ready flow: SetupRequest → Catalog → Cart → Return cXML. Use the PrestaShop native module today, and scale to Magento / WooCommerce / Custom stores via the Generic API Connector.
Handle SetupRequest, validate credentials, store BuyerCookie + return StartPage to catalog.
Use server-side session state + tokenized URLs to avoid browser cookie limitations in iframes.
Post PunchOutOrderMessage back to Buyer via BrowserFormPost (supports HTTP-204 mode too).
Optional receiver endpoint for post-PunchOut purchasing to create orders inside PrestaShop.
Support item prefill from SetupRequest (create/edit/inspect flows where applicable).
Verbose logs + masked secrets to debug ERP integration quickly.