Send invoice
Send or resend an invoice to the customer by email or text with a message.
POST https://cotlet.dev/api/v1/housecall-pro/invoices/{invoice_id}
write Confirm
Sends an invoice by email, text or both, with a custom subject and message, to the customer or to extra email addresses. Text needs online payments enabled on the invoice and a number in the Mobile field. Resending an invoice restarts the automatic reminder cadence. By default you confirm each call; you can switch that off for this tool.
Parameters
| Name | Type | Description |
|---|---|---|
| invoice_id string required | string | Invoice ID from list_invoices or get_job. |
| channels string[] | string[] | email, text or both. Default: ['email']. Text needs texting enabled on the account and a number in the customer's Mobile field. |
| to string[] | string[] | Extra email addresses. Default: the customer's email. |
| subject string | string | Email subject. |
| message string | string | Message to the customer. |
Request
curl -X POST https://cotlet.dev/api/v1/housecall-pro/invoices/inv_7c20be \
-H "Authorization: Bearer $COTLET_API_KEY" \
-H "Content-Type: application/json" \
-d '{"channels":["email"],"subject":"Reminder: invoice for your water heater service","message":"Hi Marcus, the balance of $780.00 was due on 2 October. You can pay online from the invoice. Thank you."}'result = client.call("housecall-pro", "send_invoice", {"invoice_id":"inv_7c20be","channels":["email"],"subject":"Reminder: invoice for your water heater service","message":"Hi Marcus, the balance of $780.00 was due on 2 October. You can pay online from the invoice. Thank you."})const result = await cotlet.call('housecall-pro', 'send_invoice', {"invoice_id":"inv_7c20be","channels":["email"],"subject":"Reminder: invoice for your water heater service","message":"Hi Marcus, the balance of $780.00 was due on 2 October. You can pay online from the invoice. Thank you."});cotlet call housecall-pro send_invoice --data '{"invoice_id":"inv_7c20be","channels":["email"],"subject":"Reminder: invoice for your water heater service","message":"Hi Marcus, the balance of $780.00 was due on 2 October. You can pay online from the invoice. Thank you."}'Example response
{
"invoice_id": "inv_7c20be",
"status": "sent",
"sent_to": [
"marcus@example.com"
],
"channels": [
"email"
],
"sent_at": "2026-10-14T09:30:00-05:00"
}