Zephyr does not host anything itself. It calls whatever you already run.

What is supported

For	Plugins
Hosting panels	kstack, cPanel, Plesk, DirectAdmin, Enhance
Compute	Proxmox, Hetzner Cloud, OpenStack
Bare metal	Redfish, Hetzner Robot
Registrars	CentralNic, eNom, OpenSRS
Payments	Stripe, PayPal, Mollie

What happens on a paid invoice

1. The payment is recorded and the invoice becomes paid.
2. The provisioning listener walks the order’s items.
3. For each item with a provisioning plugin, it calls that plugin to create the account.
4. A service row is written and service.created is emitted.

A failure is retried with backoff, and the reason is stored on the service rather than lost to a log.

What happens when an invoice is not paid

Dunning runs the same path in reverse: reminders, then suspend, then terminate, each at a threshold you set. Suspension calls the plugin — it is not only a flag in the database.

A word on pay-first flows

Billing before acting means any downstream failure is a customer charged and not served. Whatever you connect, make sure you have an operator retry for the provisioning step — and test it before you need it.