Cancel invoice
XML: CancelInvoice · JSON: POST /invoices/{id}/cancel
Cancels an unpaid invoice. Response: XML ResultCode=0 / JSON status: "Cancelled".
JSON API v3
Request and response (JSON)
// POST /api/v3/projects/1001/invoices/{invoice_id}/cancel
{}
// 200 OK
{
"success": true,
"data": { "invoice_id": "1624505c-...", "status": "Cancelled" }
}