> ## Documentation Index
> Fetch the complete documentation index at: https://developers.criteo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Catalog

## Introduction

A **catalog** is a snapshot of all catalog products from brands & retailers associated with the account, typically updated once a day. Each account has one catalog specifying all the products the account is eligible to promote.

* Catalogs are requested & retrieved through asynchronous endpoints

* Product attributes are scoped to the retailer except for universal IDs such as GTIN, if available

* Brand attributes are standardized across retailers

* Catalogs are in the currency of the retailer

* Catalog outputs are UTF-8 encoded

* Catalog are returned as a [newline-delimited JSON byte stream](https://en.wikipedia.org/wiki/JSON_streaming)

<Info>
  The endpoints and functionalities covered in this **page refers to features available exclusively in Preview** for now, which doesn't mean that they are the only ones available for this domain/scope.

  For more complete information about our API capabilities, check the Stable version in [Welcome to Criteo Retail Media API](/retail-media/docs/welcome-to-criteo)
</Info>

***

<br />

## What's next

* [Product Importer API](/retail-media/v2026-preview/docs/product-importer-api)
* [Product Importer payload examples](/retail-media/v2026-preview/docs/product-importer-examples)