---
title: "Browser ID"
slug: "browser-id"
abstract: "Describes the browser ID and how to use it to find a guest in Sitecore CDP."
---
# Browser ID

The browser ID is a [universally unique identifier (UUID)](https://en.wikipedia.org/wiki/Universally_unique_identifier) that Sitecore CDP assigns to every user of your app. It associates sessions, events, and orders with the respective user.

## The browser ID in integrations using the Engage SDK

The Engage SDK automatically creates the browser ID. Then, the web browser stores the browser ID as a first-party cookie. The cookie is persisted until it expires or gets deleted.

You can use the [`Engage.getBrowserId()`](https://doc.sitecore.com/cdp/en/developers/api/stream-api/sitecore-engage-sdk-reference/functions/engage-getbrowserid.html "Engage.getBrowserId()") function to get the browser ID, then [find data about the associated user](https://doc.sitecore.com/cdp/en/developers/api/integrating-with-sitecore-cdp/understanding-integration-details/browser-id.html#UUID-405a29d9-69a3-8ace-b053-0e729d131ab8_section-idm4683430262585633192162002753 "The browser ID in Sitecore CDP") in Sitecore CDP.

When you send events, the Engage SDK automatically includes the browser ID in the event data object.

## The browser ID in integrations using direct HTTP requests

You have to manually [request a browser ID](https://doc.sitecore.com/cdp/en/developers/api/stream-api/direct-http-requests-reference/retrieve-the-browser-id.html "Retrieve the browser ID") first. To do this, you make a GET request to the Browser API (Stream API type). The response includes the browser ID. In every event that you send to Sitecore CDP, you have to manually include the browser ID.

## The browser ID in Sitecore CDP

If you know the browser ID for a user of your app, you can use the browser ID to find data about the user in Sitecore CDP.

In Sitecore CDP, click **Guests**, then in the search dropdown, select **Browser ID** and enter the browser ID in the search field. For example: a38b230c-11eb-4cf9-8d5d-274e9f344925​

![Search field in the Guests screen.](https://doc.sitecore.com/api/markdown-image/cdp/en/developers/api/images/cdp-guests-bid.jpg)

Then, Sitecore CDP lists the [guest profile](https://doc.sitecore.com/cdp/en/users/sitecore-cdp/en/view-a-guest-profile-in-sitecore-cdp.html) for the user. In the guest profile, you can find session, event, and order data about your user.