We are new, so good for start to have one plugin that support other store. SecurePay is now support WordPress WooCommerce store. Just visit https://wordpress.org/plugins/securepay/ or search securepay inside your wordpress apps (you need to install woocommerce first).
We are glad if other developer want to help us on the plugins and code contribution. Please let us know and we will reward you. Refer to our API document or join our developer discussion group.