Issue a simple FE

The shortest way to issue an electronic invoice (FE) against Hacienda (Costa Rica’s tax authority): a registered customer, one product line, and an Idempotency-Key so a network retry never generates a duplicate document.


curl -X POST https://api.pos.lxsyscr.com/api/v1/facturas \
  -H "X-Api-Key: $LXS_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: $(uuidgen)" \
  -d '{
    "tipo": "FacturaElectronica",
    "idUsuario": 7,
    "cliente": { "idCliente": 42 },
    "condicionVenta": "01",
    "medioPago": "01",
    "moneda": "CRC",
    "lineas": [
      { "idProducto": 100, "cantidad": 2 }
    ]
  }'

The response contains the 50-digit clave and the initial estadoHacienda (typically procesando). To learn the final status, subscribe to webhooks or query the detail endpoint.