Send invoice
Email an invoice, or a reminder for it, to the contacts that receive it.
POST https://cotlet.dev/api/v1/invoice-ninja/invoices/{invoice_number}
write Confirm
Emails the invoice to the contacts ticked to receive it on that invoice and returns who got it. A draft becomes Sent: the client balance goes up by the invoice balance, the invoice appears in the client portal and reminders start counting against the due date. A Sent invoice can be sent again. Template is invoice by default, or reminder1, reminder2, reminder3 or reminder_endless to use the matching template from Settings > Templates & Reminders. A late fee is added only if your reminder settings define one. By default you confirm each call; you can switch that off for this tool.
Parameters
| Name | Type | Description |
|---|---|---|
| company string | string | Company name, for accounts with several companies. Default: the company open when you signed in. |
| invoice_number string required | string | Invoice number from list_invoices or create_invoice, e.g. INV-0038. |
| template enum | enum | invoice, reminder1, reminder2, reminder3 or reminder_endless. Default: invoice. |
Request
curl -X POST https://cotlet.dev/api/v1/invoice-ninja/invoices/INV-0038 \
-H "Authorization: Bearer $COTLET_API_KEY" \
-H "Content-Type: application/json" \
-d '{"template":"reminder1"}'result = client.call("invoice-ninja", "send_invoice", {"invoice_number":"INV-0038","template":"reminder1"})const result = await cotlet.call('invoice-ninja', 'send_invoice', {"invoice_number":"INV-0038","template":"reminder1"});cotlet call invoice-ninja send_invoice --data '{"invoice_number":"INV-0038","template":"reminder1"}'Example response
{
"invoice_number": "INV-0038",
"status": "sent",
"template": "reminder1",
"sent_to": [
"ap@brightwave.example"
],
"sent_at": "2026-10-14T09:00:00+02:00",
"balance": 1800
}