The web services are mapped under /mpi and handle HTTP POST requests. I.e. to call createPaReqIfEnrolled post your request to /mpi/createPaReqIfEnrolled.
The MPI provides two web service operations to support 3-D Secure transactions:
| Operation | Request | Response | Description |
| createPaReqIfEnrolled | PaReqCreationRequest | PaReqCreationResponse | Verifies enrollment with the Directory Server and creates the PaReq to be sent to the ACS. |
| validatePaRes | PaResValidationRequest | PaResValidationResponse | Validates the PaRes returned by the ACS and provides authentication information. |
The MPI provides three web service operations to support Union Pay transactions:
| Operation | Request | Response | Description |
| createAuthenticationReq | AuthReqCreationRequest | AuthReqCreationResponse | Creates the MsgReq to be sent to UPOP. |
| validateAuthenticationRes | AuthResValidationRequest | AuthResValidationResponse | Validates the MsgRes returned by UPOP and provides authentication information. |
| inquireAuthenticationStatus | AuthStatusInquiryRequest | AuthStatusInquiryResponse | Inquires UPOP about the status of a transaction |
The web service operations can consume the following media types:
While they can produce the following media types:
When calling the web service, specify the media type of your content using the Content-Type HTTP header and specify the media type you wish to get back in the response using the Accept HTTP header.
Refer to the MPI 3DS API and the MPI UPOP API documentation for details about the request / response structures and for sample requests.