---
title: About iQ Revisions API
description: This article describes how to use the iQ Revisions API.
url: https://docs.tealium.com/api/v2/iq-revisions/about/
--- 
## How it works

A new revision is created each time a _Save as_ action is performed. As each version is updated or published, the status is reflected in the revision.

## Prerequisites

The iQ Revisions API must be activated for your account before it will return revision information. [Contact Support Desk](https://support.tealiumiq.com/) to request the activation.

## Authentication


<blockquote>
The bearer token is used to authenticate all API calls and not the API key. The API key is only used in the authentication call.
</blockquote>


See the [Getting Started](https://docs.tealium.com/api-authentication/) guide to learn about generating a bearer token from the API key.