# Restrict API calls based on request IP

## Overview <a href="#overview" id="overview"></a>

Restrict API calls based on request IP address and increase the security of your account by preventing unauthorized API usage. By default, you can call the 2Checkout API from any IP.

{% hint style="info" %}
Currently, the 2Checkout systems do not support IPv6 for customer IP.
{% endhint %}

## Availability <a href="#availability" id="availability"></a>

All 2Checkout accounts.

## Set up <a href="#set-up" id="set-up"></a>

1. Navigate to  Settings » Users » [Firewall](https://secure.2checkout.com/cpanel/ip_tools.php).
2. Specify a static IP address or a range of IP addresses.&#x20;
3. In the **Selected Users** area, apply the restriction to API (Special).&#x20;
4. Add the IP filter.&#x20;
5. Activate the IP filtering system.


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