American Express SafeKey {#cc-pa-amex-intro}
============================================

American Express SafeKey is the authentication service in the American Express card network that uses the 3-D Secure protocol to validate customers at checkout. When you request an authorization using a supported card type and a supported processor, you can include payer authentication data in the request.  
Before implementing payer authentication for American Express SafeKey, contact customer support to have your account configured for this feature.

Fields Specific to the American Express SafeKey Use Case
--------------------------------------------------------

These API fields are required specifically for this use case.

ccAuthService_cavv
:
Required when payer authentication is successful.

ccAuthService_commerceIndicator
:
Set this field to one of these values:

    * `aesk`: Successful authentication (3-D Secure value of `05`).
    * `aesk_attempted`: Authentication was attempted (3-D Secure value of `06`).
    * `internet`: Authentication failed or was not attempted (3-D Secure value of `07`).
    {#cc-pa-amex-intro_ul_onm_fn1_jxb}

Endpoint {#cc-pa-amex-intro_d7e16}
----------------------------------

Set the ccAuthService_run field to `true`.  
Send the request to `https://ics2ws.ic3.com/commerce/1.x/transactionProcessor`.