Like all our products, you only pay for cloud automation if you use it. So there are no costs for you if Cloud Automation is not active.
Cloud automation consists of two components.
1. events that enter and are processed from your infrastructure into Cloud Automation.
2. actions that are executed based on a defined task, e.g. sending an e-mail.
You pay 0,01€ for each incoming event and for the respective action only if they are executed. Slack webhooks, HTTP requests and e-mails are free. Therefore, only the incoming events are currently calculated