RDX Specification

StepupRequest

If the Risk assessment results in a status of Stepup, the issuer then determines how they want to challenge the cardholder. The result of this step consists mainly of a list of ways that the cardholder can be challenged, also known as “Credentials”.

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StepupRequest API Reference: Interactive request/response specification

StepupRequest Code Recipe: Pseudocode resource with code snippets

NameDescriptionTypeLengthRequired
ProcessorIdVCAS generated transaction reference id: 24-character GUID value.StringUp to 24 charactersRequired
IssuerIdVCAS generated transaction reference id: 24-character GUID value.StringUp to 24 charactersRequired
TransactionId VCAS generated transaction reference id: 36-character GUID value.StringUp to 36 charactersRequired
DSTransactionId Directory Server (DS) generated transaction reference id. GUID format. String36 charactersConditional
3RIIndicatorIndicates the type of 3RI request for EMV transactions.

Note: Please allow for future values in this field. EMV has reserved up to 99 values for future use.

3RI Indicator Values		StringString; enumOptional
ThreeDSRequestorAuthenticationIndIndicates the type of 3RI request for EMV transactions.

Note: Please allow for future values in this field. EMV has reserved up to 99 values for future use.

3DS Requestor Authentication Values		String2 charactersOptional
StepupRequestId Unique identifier to identify the particular Stepup request. Length is 36 characters.StringUp to 36 charactersOptional
StepupCounter Counter for tracking the number of Stepup calls.
Each Stepup can go from Stepup ➤ InitiateAction ➤ Validate.

If the user requests a "resend" via the browser or native app templates it will initiate another Stepup request. Note: Initial value will be 0 (zero).		IntegerRequired
DeviceLocale Device Locale from the browser header or from the native application’s language settings. This value can be a single locale value or multiple values concatenated via commas. In EMV 3DS this is not available due to new flows so this will be a single language value following BCP 47 format.

Examples:

  • en-US
  • en,es-PE;q=0.9,es;q=0.8
    		• StringUp to 2048 charactersOptional
    DeviceUserAgent Device user agent from the browser header or the app’s device identifierStringUp to 2048 charactersOptional
    MessageVersion Version of the 3DS protocol based on 3DS spec.

    This version will increment with each new specification released by EMVCo for 2.x. This will typically follow a X.Y.Z version format.
    Examples:

  • 2.1.0
  • 2.2.0
    		• StringUp to 8 characters.Required
    RDXMessageVersion Message Version of the RDX protocol being used. This will be used to enable new features without breaking current integrations. Example: 2.2.2 or 2.2.3StringUp to 8 charactersOptional
    MessageCategoryIdentifies the category of the message for a specific use case.
    01 = PA
    02 = NPA
    03-79 = Reserved for EMVCo future use
    80-99 = Reserved for DS use    		String2 charactersOptional
    StepupReason The reason the Stepup request was initiated. Example: CARDHOLDER_RESEND - When the cardholder is challenged and clicks the Resend button on the OTP validate page, the next Stepup request will contain this value.
    Note: Only available for Cardholder Resend, future values and scenarios may be added.    		StringEnumOptional
    MerchantInfo Object containing the Merchant information.

    StepupRequest.MerchantInfo    		ObjectNAOptional
    PaymentInfo Object containing the PaymentInfo.

    StepupRequest.PaymentInfo    		ObjectNAOptional
    TransactionInfo Object containing the Transaction information.

    StepupRequest.TransactionInfo    		ObjectNAOptional
    CardholderSelectionInfo Object defining the consumers selection during the Cardholder Selection OTP flow. This feature is only populated and enabled for issuers supporting this flow.

    StepupRequest.CardholderSelectionInfo    		ObjectNAOptional
    EmbeddedOOBResponseUrl The issuer must redirect to this URL when validation is complete, during an Embedded OOB challenge.StringNAConditional

    Updated about 2 months ago