Faturação portuguesa, conforme com a AT, numa única API.

$ curl -X POST https://api.fiscolify.com/v1/documents \
   -H "Authorization: Bearer ck_live_•••" \
   -d '{ "type": "FT", "series_id": "ser_…",
         "party": { "nif": "501234567", "name": "Cliente Lda" },
         "lines": [{ "description": "Consultoria",
           "quantity": 1, "unit_price": 1000, "tax_rate": 23 }] }'

{
  "number": "FT A/2026/1",
  "atcud":  "AJ7K2P9QX-1",
  "hash":   "kF3a",
  "qr_code_data": "A:501234567*B:…",
  "at_status": "N"
}