Hi @Florian Kroessbacher
From Webex REST API, you can use the /create-a-meeting API where in the invitees field, you can make an invitee as coHost="true" and the Co-host can do those stuffs for you.
Here is the list about what all permissions a Co-host would have during the meeting - https://help.webex.com/en-us/article/n1bqkbv/Assign-cohosts-in-Webex-Meetings-and-Webex-Webinars
And, if you think you'd not be available at all for that meeting, then you can set a different for the meeting and you can provide the required email_id under the field - hostEmail.
Hope this helps!
Please reply back or, comment back here if you've any further query on this.
Regards,
Sandip