Webhook deliveries
POST https://api.northwind.app/webhooks/billing
invoice.payment_failedFailed
Request body
"id": "evt_1Q8v",
"type": "invoice.payment_failed",
"invoice_id": "inv_81",
"reason": "card_declined",
"next_retry": "2026-10-08T09:58:44Z"
}
}
Response
HTTP/1.1 500 Internal Server Error TypeError: Cannot read properties of undefined (reading 'customer')