Payment Plugin: Payone
Configure Portal-ID, Sub-Account-ID and Key at aMember CP -> Setup/Configuration -> Payone You can get IDs and Key from Payone Merchant Interface -> Configuration -> Payment Portals Click 'Edit' link near to an existing Portal or create new one using 'Add Portal' button. Then navigate to 'API-Parameters' tab.
Configure 'SessionStatus URL' and 'TransactionStatus URL' at Payone Merchant Interface -> Configuration -> Payment Portals: Advanced to the following URL: https://example.com/amember/payment/payone/ipn
Configure 'PayOne Offer ID' at aMember CP -> Manage Products -> Edit Set it up first at Payone Merchant Interface -> Configuration -> Payment Portals: Offers