# Integration Reference

## <mark style="color:blue;">General information and capabilities</mark>

Gateway's API is built in a REST style, based on the JSON-API specification. API provides universal programmatic access to operate through a payment page or directly in a host-to-host way.&#x20;

PCI-DSS Level 1 certified. We use the most advanced methods to protect your money, we have Strong Customer authentication, and 3D Secure for online card payments.

## <mark style="color:blue;">Features</mark>

* JSON-API based on RESTful JSON API standard
* Advanced authentication using client certificates
* 1-stage and 2-stage payments
* Payment flows: payment page or server-to-server using universal API
* 3-D Secure support
* Repeating payment without providing card number, expiration date, and cardholder name
* Optional fields for extra parameters
* Segment selection to divide payments
* Selection of the payment page language and layout
* Setting payment session expiration timeout
* Payments to the card (OCT)
* Passing of dynamic descriptor
* Recurrent payments
* Multicurrency
* Perform authorizations with zero-amount
* DSRP
* 3-D Secure 2.0 support

{% hint style="danger" %}
For security reasons, we use keys to Log In to Merchant dashboard
{% endhint %}


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