westpac.com.au/business-banking/merchant-services/online-payments
- Countries: Australia, New Zealand
- Magento 2 extension: no (do you want to integrate it?)
- API: not published (an overview)
- GitHub
- Twitter:
Previously, Westpac provided «Web Advantage eCommerce payment gateway».
I found an old Administration Guide for it (Westpac Web Advantage Administration - User Guide - Version V1.8, July 2005):
Westpac Web Advantage Administration - User Guide - Version V1.8, July 2005.pdf (1.1 MB)