# Allowed Hosts

Restrict which websites can call your flows by configuring the allowed hosts.

{% hint style="warning" %}
This is not a security feature, if you would like to secure a flow, please refer to the [auth integrations](https://docs.alphi.dev/authentication).
{% endhint %}

## URL Format

```
https://www.example.com
```

{% hint style="info" %}
Hosts must not include a trailing slash.
{% endhint %}

## Multiple allowed hosts

To add multiple allowed hosts, separate your URLs using `,` .

```
https://www.example.com, https://example.webflow.io
```