Enabling `Click to Pay Drop-In UI` Using the API {#boarding-click-to-pay-enable-intro}
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This section shows you how to enable `Click to Pay Drop-In UI` using the Boarding Registration Service (BRS) API.  
To enable `Click to Pay` 3DS authentication, you must include these fields in your request:

* productInformation.selectedProducts.payments.unifiedCheckout. configurationInformation.configurations.features.clickToPay.enrollmentData.acquirerBIN
* productInformation.selectedProducts.payments.unifiedCheckout. configurationInformation.configurations.features.clickToPay.enrollmentData.acquirerName

{#boarding-click-to-pay-enable-intro_ul_cll_v4m_3jc}For information about enabling `Click to Pay` authentication, see [Enable Click to Pay Customer Authentication Using the API](/docs/cybs/en-us/click-to-pay/developer/all/rest/click-to-pay/ctp-configuration-intro/ctp-authentication/boarding-click-to-pay-auth-enable-intro.md "").

Endpoint {#boarding-click-to-pay-enable-intro_d11e752}
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**Production:** `POST ``https://api.cybersource.com``/boarding/v1/registrations`{#boarding-click-to-pay-enable-intro_d11e759}  
**Test:** `POST ``https://apitest.cybersource.com``/boarding/v1/registrations`{#boarding-click-to-pay-enable-intro_d11e769}