{
  "endpoint": "recordInvoicePayment",
  "description": "Ueberweisung trifft spaeter ein",
  "request": {
    "idempotencyKey": "ex-payment-1",
    "invoiceId": "invoice_example",
    "method": "transfer",
    "amountCents": 12000,
    "paidAt": "2026-09-20"
  },
  "expected": {
    "ok": true
  }
}