If you are a 2Checkout supplier using the 1ShoppingCart system, we wish to remind you that they have been upgrading their customers’ accounts. As part of this upgrade any customers using 2Checkout will need to change their approved URL from https://www.mcssl.com/app/postauthorizeb.asp to https://www.mcssl.com/SecureCart/Authorize.aspx, after their account has been upgraded.

Suppliers can confirm which URL they should be using by logging into their 1ShoppingCart account and going to their Gateway Setup page which is located on the Setup menu. By clicking on the “More Details” link next to their gateway ID they will be able to access the instructions which contain the correct URL. Those that have not yet been upgraded will see https://www.mcssl.com/app/postauthorizeb.asp and those that have been upgraded will see https://www.mcssl.com/SecureCart/Authorize.aspx

We’d like to thank 1ShoppingCart for the information.