Payment Plugin: 1ShoppingCart/MCSSL
Enable "1shoppingcart" payment plugin at aMember CP -> Configuration -> Add-ons
Configure "1shoppingcart" payment plugin at aMember CP -> Configuration -> Setup/Configuration -> 1ShoppingCart Make sure you set the same API Key in aMember CP and 1ShoppingCart Merchants CP -> My Account -> API Settings -> Your Current Merchant API Key
Create equivalents for all aMember products in 1ShoppingCart Merchants CP. Make sure it has the same subscription terms (period, price) as aMember Products. Set "Thanks URL" for all 1ShoppingCart products to https://example.com/amember/thanks Write down product# of all 1ShoppingCart products.
Visit aMember CP -> Manage Products, click "Edit" on each product and enter "1ShoppingCart Product#" for each corresponding billing plan, then click "Save".
Try your integration - go to aMember signup page, and try to make new signup.
In case of any issues with IPN Notifications (if members is not activated in aMember automatically)
Please try to click 'Repost Order To aMember' link at your 1SC account -> Orders -> Order Details and check is notification receved at aMember CP -> Utilites -> Logs
Check also 1ShoppingCart in front of aMember configuration instructions.