Merchant plug-in

A merchant plug-in (MPI) is a software module designed to facilitate 3D-Secure verifications to help prevent credit card fraud. The MPI identifies the account number and queries the servers of the card issuer (Visa, MasterCard, or JCB International) to determine if it is enrolled in a 3D-Secure program and returns the web site address of the issuer access control server (ACS) if it is found. Merchants are responsible for using an SSL/TLS MPI at their servers. Commercial MPI software is available from a number of vendors.

Merchant plug-in

A merchant plug-in (MPI) is a software module designed to facilitate 3D-Secure verifications to help prevent credit card fraud. The MPI identifies the account number and queries the servers of the card issuer (Visa, MasterCard, or JCB International) to determine if it is enrolled in a 3D-Secure program and returns the web site address of the issuer access control server (ACS) if it is found. Merchants are responsible for using an SSL/TLS MPI at their servers. Commercial MPI software is available from a number of vendors.