After you add it to your project, this is all it takes.
curl -X POST 'https://api.sendsend.email/v1/emails' \
-H "Authorization: Bearer $SENDSEND_API_KEY" \
-H 'Content-Type: application/json' \
-H "Idempotency-Key: $(uuidgen)" \
-d '{
"from": "Acme <hello@mail.acme.com>",
"to": [
"maria@example.com"
],
"template_id": "woo-order-cancelled",
"variables": {
"customer_name": "Maria",
"order_number": "#1042",
"order_date": "2026-10-12",
"items": [
{
"name": "Linen shirt",
"quantity": 2,
"price": 45
},
{
"name": "Canvas tote",
"quantity": 1,
"price": 22
}
],
"subtotal": 112,
"shipping_total": 8,
"tax_total": 15.6,
"total": 135.6,
"payment_method": "Credit card",
"billing_address": "Maria Lopez, 12 King St, Toronto ON",
"shipping_address": "Maria Lopez, 12 King St, Toronto ON",
"order_url": "https://shop.example.com/my-account/orders/1042",
"store_name": "Northwind Goods",
"reason": "Cancelled at your request"
}
}'
