Invoices

Email invoice

Send the customer their invoice again.

POST/v1/invoices/{invoice_id}/email

Operation email_invoice · Scope invoices:write · Spec snapshot 2026-09-13

Parameters

Parameter	Description
invoice_idstring · pathrequired	No description in the spec.

Returns an InvoiceEmailResponse object.

Status	Cause
401	Missing or invalid API key.
403	Key is missing the `invoices:write` scope.
404	No such object, or it belongs to the other mode.
422	Validation Error
429	Rate limited. Back off and retry.

Request · curl

curl -X POST https://api.billkit.eu/v1/invoices/inv_9XKp2vQ1/email \
  -H "Authorization: Bearer $BILLKIT_SECRET_KEY"

curl -X POST https://api.billkit.eu/v1/invoices/inv_9XKp2vQ1/email \
  -H "Authorization: Bearer $BILLKIT_SECRET_KEY"

Response · 200 OK

{
  "invoice_id": "inv_9XKp2vQ1",
  "object": "invoice.email",
  "recipient": "string",
  "sent": true
}

{
  "invoice_id": "inv_9XKp2vQ1",
  "object": "invoice.email",
  "recipient": "string",
  "sent": true
}