First of all, thank you very much for your response. Maybe my question was a little bit too short, and yes, what I want to get is the MacroDruid UUID that ist used for webhooks (or the webhook link at all).
This would make it possible to send an SMS to a tablet (these tablets are all serviced remotely and are used in emergency cars to push them address of an alert, find there psositions etc.) and the tablet to respond with it's webhook Url (or the UUID, then I can concat the url myself).
Would be extremly useful for me!