# Security

## Altoviz IP addresses

Outbound traffic of the Altoviz API is coming from a limited set of public IP.

```text
20.23.10.180
20.23.10.181
```

You can easily check if your inbound traffic is coming from these APIs.

## Certificate public key

The Altoviz API servers are using an SSL certificate you can check using the available public key

```html
https://altoviz.com/altoviz.pub
```

You can check if the server you're calling is using the corresponding certificate or not.

## Use secret key for webhooks

Our webhooks are using secrets key for a very simple security check. You send us a key during a webhook registration and you should expect the same key to be part of every webhook calls.  
[Read more](/docs/api/guides/webhooks)