The Device ID is an important piece of information to ensure better security and, consequently, a better payment approval rate. It's a unique number that's used to identify a customer's device when they are buying.

If a customer makes a purchase on a different device than usual, this may represent an atypical behavior. The Device ID could help us to make a correct assessment and avoid legitimate payment rejections.

You can add the Mercado Pago security code to your website by replacing the value view with the name of the section of your website where you want to add it.

To use the Device ID on your web and prevent possible fraudulent purchases, follow the steps below:

To generate Device IDs on your website, add the following code to your Checkout page:

<script src="https://www.mercadopago.com/v2/security.js" view="checkout"></script>

When you add the Mercado Pago security code to your site, a global JavaScript variable is automatically created with the name MP_DEVICE_SESSION_ID, whose value is the Device ID.

If you prefer that we assign it to another variable, indicate the name by adding the attribute output, as in the following example:

<script src="https://www.mercadopago.com/v2/security.js" view="checkout" output="deviceId"></script>

You can also create your own variable by adding an HTML tag on your site as id="deviceId" and the code will automatically assign the value device_id.

<input type="hidden" id="deviceId">

Once you have the Device ID, you must send it to our servers when creating a payment. To do so, simply add the following header to the request:

X-meli-session-id: device_id