curl --request POST \
  --url https://paperjoy.co/api/postcards \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'Idempotency-Key: <idempotency-key>' \
  --data '
{
  "address": {
    "line_1": "ul. Marszałkowska 10",
    "line_2": "m. 4",
    "postal_code": "00-001",
    "country": "PL",
    "city": "Warszawa"
  },
  "recipient": {
    "prefix": "Pani",
    "first_name": "Anna",
    "last_name": "Kowalska",
    "company_name": null
  },
  "content": "Droga Anno,\ndziękujemy za pierwsze zamówienie! Mamy nadzieję, że kwiaty sprawiły Ci dużo radości.",
  "signature": "Marta z Kwiaciarni Pod Lipą",
  "font_id": "font-1",
  "mistake": false
}
'

{
  "data": {
    "id": "pc_MXP7a4Ni0c",
    "test_mode": true,
    "address": {
      "line_1": "ul. Marszałkowska 10",
      "line_2": "m. 4",
      "postal_code": "00-001",
      "country": "PL",
      "city": "Warszawa"
    },
    "recipient": {
      "prefix": "Pani",
      "first_name": "Anna",
      "last_name": "Kowalska",
      "company_name": null
    },
    "content": "Droga Anno,\ndziękujemy za pierwsze zamówienie! Mamy nadzieję, że kwiaty sprawiły Ci dużo radości.",
    "signature": "Marta z Kwiaciarni Pod Lipą",
    "signature_id": null,
    "font_id": "font-1",
    "mistake": false,
    "status": "new",
    "submitted_at": "2026-10-17T14:31:48+00:00",
    "sent_at": null,
    "created_at": "2026-10-17T14:31:48+00:00",
    "updated_at": "2026-10-17T14:31:48+00:00"
  }
}