SDKs

pip install ecfservice

from ecfservice import ECFClient, ECFPayloadBuilder

payload = (
    ECFPayloadBuilder(ecf_type="31")
    .id_doc(eNCF="E310000000001", FechaVencimientoSecuencia="31-12-2028")
    .emisor(RNCEmisor="130478031", RazonSocialEmisor="Mi Empresa SRL", FechaEmision="15-08-2026")
    .comprador(RNCComprador="131098193", RazonSocialComprador="Cliente SRL")
    .totales(MontoTotal=11800.0, TotalITBIS=1800.0)
    .add_item({"NumeroLinea": 1, "NombreItem": "SERVICIO DEMO", "MontoItem": 10000.0})
    .build()
)

with ECFClient(api_key="ecf_...") as client:
    doc = client.ecf.create(
        idempotency_key="INV-2026-0001",
        ecf_type="31",
        environment="TesteCF",
        payload=payload,
    )
    print(doc.public_id, doc.status)
    xml = client.ecf.download_xml(doc.public_id)

dotnet add package EcfService.Sdk --version 0.3.0

using EcfService.Sdk;
using EcfService.Sdk.Models;

using var client = new EcfClient("ecf_...");

var payload = new EcfPayloadBuilder(EcfType.E31)
    .IdDoc(new Dictionary<string, object?> { ["eNCF"] = "E310000000001" })
    .Emisor(new Dictionary<string, object?>
    {
        ["RNCEmisor"] = "130478031",
        ["RazonSocialEmisor"] = "Mi Empresa SRL",
        ["FechaEmision"] = "15-08-2026",
    })
    .AddItem(new Dictionary<string, object?> { ["NumeroLinea"] = 1, ["NombreItem"] = "Servicio", ["MontoItem"] = 10000.0 })
    .Build();

var doc = await client.Ecf.CreateAsync("INV-2026-0001", EcfType.E31, payload, environment: EcfEnvironment.Test);
Console.WriteLine($"{doc.PublicId} {doc.Status}");