# User Agents

To limit access to your application to specific user agents, add them to the **User Agents** allowlist.

When you add a User-Agent to an allowlist, any API requests originating from other platforms are rejected.

{% hint style="info" %}
Find out more about the HTTP Header [User-Agent](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/User-Agent).
{% endhint %}

<figure><img src="https://3851559242-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FdWnQXn9w0LzfZSfrH31H%2Fuploads%2Fru5hV7AR2s7QIkUyH6Iu%2Fimage.png?alt=media&#x26;token=15805db4-5b81-4339-ac55-4ce60c7d8172" alt=""><figcaption></figcaption></figure>

Kindly be informed that the settings are expected to become active in around 1 minute.
