Ready-made plugins that connect your shop to the Coriunder hosted payment page. Install the package for your platform, enter your merchant number, and start taking payments - no development work and no card data on your own server.
Whichever platform you install, the flow is the same: the shopper picks Coriunder at checkout, pays on the Coriunder hosted payment page, and returns to your shop. A signed server-to-server notification confirms the result before the order changes state, so a forged callback cannot mark an order as paid. Card details never reach your shop.
The request signature, the reply and webhook signatures and the reply codes are documented once, on the release history page, along with every version of every plugin.