mcp-fattura-elettronica-it 0.5.0

MCP server for Italian e-invoicing — FatturaPA XML / SDI

mcp-fattura-elettronica-it 🇮🇹

English | Italiano

A Python MCP server for Italian electronic invoicing in FatturaPA XML format (SDI / Agenzia delle Entrate standard, version 1.2.3). It enables AI agents (Claude, IDEs) to generate, validate, and analyze B2B, B2G, and cross-border electronic invoices that are directly compliant with the technical specifications of the Sistema di Interscambio (SDI).

This is a Model Context Protocol (MCP) server exposing 30 tools covering the full lifecycle of a FatturaPA XML document: transmission header construction, seller/buyer validation, document type codes (TD01-TD28), line items, VAT summary computation, payment terms, XSD validation against the official Agenzia delle Entrate schema (v1.2.3), XML generation, parsing, JSON export, SDI filename generation, and withholding tax (ritenuta d'acconto) calculation. The server requires no external API calls, as all logic runs locally. Licensed under Apache 2.0.

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🚀 Installation

Via PyPI (recommended)

pip install mcp-fattura-elettronica-it

mcp-einvoicing-core is installed automatically as a dependency. lxml is also required and included, so no extra steps are needed.

Without prior installation, using uvx:

uvx mcp-fattura-elettronica-it

From source

git clone https://github.com/cmendezs/mcp-fattura-elettronica-it.git
cd mcp-fattura-elettronica-it

python -m venv .venv
source .venv/bin/activate   # Windows: .venv\Scripts\activate

pip install -e ".[dev]"
cp .env.example .env

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⚙️ Configuration

The server does not require external credentials in v0.1.0. The available environment variables are:

Variable	Description	Default
LOG_LEVEL	Log level (DEBUG, INFO, WARNING, ERROR)	INFO
FATTURA_XSD_PATH	Path to the FatturaPA XSD file	schemas/FatturaPA_v1.2.3.xsd

🤖 Claude Desktop integration

Add the following to your claude_desktop_config.json file:

{
  "mcpServers": {
    "fattura-elettronica-it": {
      "command": "uvx",
      "args": ["mcp-fattura-elettronica-it"]
    }
  }
}

⌨️ Cursor integration

Configuration file (~/.cursor/mcp.json or .cursor/mcp.json in the project folder):

{
  "mcpServers": {
    "fattura-elettronica-it": {
      "command": "uvx",
      "args": ["mcp-fattura-elettronica-it"]
    }
  }
}

🪐 Kiro integration

{
  "mcpServers": {
    "fattura-elettronica-it": {
      "command": "uvx",
      "args": ["mcp-fattura-elettronica-it"],
      "disabled": false,
      "autoApprove": []
    }
  }
}

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🧰 Available MCP tools

Header: FatturaElettronicaHeader (7 tools)

Tool	Description
build_transmission_header	Build DatiTrasmissione block: ProgressivoInvio, CodiceDestinatario, PECDestinatario
validate_cedente_prestatore	Validate seller block: IdFiscaleIVA, Anagrafica, Sede, RegimeFiscale codes
validate_cessionario	Validate buyer block: IdFiscaleIVA or CodiceFiscale, Sede
get_regime_fiscale_codes	Return all valid RegimeFiscale codes with descriptions (RF01-RF19)
validate_partita_iva	Validate Italian VAT number (Partita IVA) format and checksum (11 digits)
generate_progressivo_invio	Generate a unique ProgressivoInvio identifier (max 10 alphanumeric chars)
lookup_codice_destinatario	Return info about a CodiceDestinatario (6-char SDI code) or PEC address

Body: FatturaElettronicaBody (7 tools)

Tool	Description
build_dati_generali	Build DatiGenerali block: TipoDocumento, Divisa, Data, Numero, Causale
get_tipo_documento_codes	Return all TD01-TD28 codes with descriptions and use cases (incl. cross-border)
add_linea_dettaglio	Add a DettaglioLinee entry: NumeroLinea, Descrizione, Quantita, PrezzoUnitario
compute_totali	Compute DatiRiepilogo: imponibile, imposta, AliquotaIVA from line items
get_natura_codes	Return all Natura codes (N1-N7 and sub-codes) for VAT exemption with legal references
build_dati_pagamento	Build DatiPagamento: CondizioniPagamento (TP01/02/03), ModalitaPagamento (MP01-MP23)
add_allegato	Attach a base64-encoded document to the Allegati block with name and format

Global: generation and validation (7 tools)

Tool	Description
generate_fattura_xml	Generate a complete FatturaPA XML file from structured input data
validate_fattura_xsd	Validate a FatturaPA XML string against the official XSD schema v1.2.3
parse_fattura_xml	Parse an existing FatturaPA XML string and return a structured JSON dict
export_to_json	Export a parsed FatturaPA structure to clean JSON format
validate_partita_iva_format	Validate Partita IVA format and Luhn-like checksum (11-digit Italian VAT)
get_sdi_filename	Generate the official SDI filename: IT{PartitaIVA}_{ProgressivoInvio}.xml
check_ritenuta_acconto	Check and compute ritenuta d'acconto (withholding tax) for professional invoices

Simplified invoices: FatturaSemplificata VFSM10 (3 tools)

Tool	Description
generate_fattura_semplificata	Generate a simplified invoice XML (TD07/TD08/TD09) using VFSM10 format
validate_fattura_semplificata_xsd	Validate a simplified invoice XML against the VFSM10 XSD v1.0.2
parse_fattura_semplificata_xml	Parse a simplified invoice XML into a structured dict

Simplified invoices (art. 21-bis DPR 633/72) are valid for transactions up to EUR 400 (tax-inclusive). They use a flatter structure than ordinary FatturaPA: no per-line VAT breakdown, no DatiRiepilogo. Each DatiBeniServizi entry carries its own Descrizione, Importo, and DatiIVA. The VFSM10 format uses namespace v1.0 and is separate from the EN 16931 CIUS used by ordinary invoices.

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Usage examples

Example 1: Generate a complete B2B invoice

1. validate_partita_iva_format("01234567897")
   → { "valid": true }

2. generate_progressivo_invio(sequence=1)
   → { "progressivo_invio": "00001" }

3. build_transmission_header(id_paese="IT", id_codice="01234567897",
     progressivo_invio="00001", formato_trasmissione="FPR12",
     codice_destinatario="ABC123")

4. validate_cedente_prestatore(id_paese="IT", id_codice="01234567897",
     denominazione="ACME Srl", regime_fiscale="RF01",
     indirizzo="Via Roma 1", cap="00100", comune="Roma", nazione="IT")

5. validate_cessionario(denominazione="Buyer Srl",
     id_paese="IT", id_codice="98765432109",
     indirizzo="Via Verdi 2", cap="20100", comune="Milano")

6. build_dati_generali(tipo_documento="TD01", data="2026-01-15",
     numero="2026/001", divisa="EUR")

7. add_linea_dettaglio(numero_linea=1, descrizione="Consulenza informatica",
     quantita=8, unita_misura="ORE", prezzo_unitario=100.0,
     prezzo_totale=800.0, aliquota_iva=22.0)

8. compute_totali(linee=[{"prezzo_totale": 800.0, "aliquota_iva": 22.0}])
   → { "totale_fattura": "976.00" }

9. build_dati_pagamento(condizioni_pagamento="TP02", modalita_pagamento="MP05",
     importo_pagamento=976.0, iban="IT60X0542811101000000123456")

10. generate_fattura_xml(...all previous blocks...)
    → { "xml": "<?xml ...", "filename": "IT01234567897_00001.xml" }

11. validate_fattura_xsd(xml_string=...)
    → { "valid": true }

Example 2: Professional invoice with withholding tax

check_ritenuta_acconto(imponibile=1000.0, tipo_ritenuta="RT02",
  causale_pagamento="A")
→ {
    "DatiRitenuta": {
      "TipoRitenuta": "RT02",
      "ImportoRitenuta": "200.00",
      "AliquotaRitenuta": "20.00",
      "CausalePagamento": "A"
    },
    "importo_ritenuta": "200.00"
  }

Example 3: Look up VAT exemption codes

get_natura_codes()
→ codes: [
    { "code": "N3.1", "description": "Non imponibili — esportazioni",
      "legal_ref": "Art. 8 DPR 633/72" },
    { "code": "N6.1", "description": "Inversione contabile — rottami",
      "legal_ref": "Art. 74 c. 7-8 DPR 633/72" },
    ...
  ]

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Architecture

mcp-fattura-elettronica-it (this package, standalone MCP server)
├── ItalyPartyValidator(BasePartyValidator)   ← Partita IVA modulo-10
├── FatturaGenerator(BaseDocumentGenerator)   ← FatturaPA XML v1.2.3
├── FatturaValidator(BaseDocumentValidator)   ← lxml XSD v1.2.3
└── FatturaParser(BaseDocumentParser)         ← lxml xpath

        ↑ extends
mcp-einvoicing-core (shared foundation, installed as dependency)
├── BaseDocumentGenerator / Validator / Parser / PartyValidator
├── InvoiceDocument, InvoiceParty, InvoiceLineItem … (Pydantic)
├── xml_utils, logging_utils, exceptions
└── EInvoicingMCPServer (optional multi-country aggregator)

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📚 Reference standards

Resource	Link
FatturaPA specifications	fatturapa.gov.it
Official XSD v1.2.3	Schema v1.2.2, Agenzia delle Entrate
XML namespace	http://ivaservizi.agenziaentrate.gov.it/docs/xsd/fatture/v1.2
SDI, Sistema di Interscambio	Agenzia delle Entrate
Withholding tax (ritenuta d'acconto)	Art. 25 DPR 600/73, Modello 770

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🧪 Tests

# Install development dependencies
pip install -e ".[dev]"

# Run all tests
pytest tests/ -v

# Run only MCP integration tests
pytest tests/test_mcp_integration.py -v

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Roadmap

Version	Features
v0.1.0	XML generation, XSD validation, parsing, 21 MCP tools, withholding tax
v0.2.0	Simplified invoices (TD07/TD08/TD09), FPA12 batch invoicing, Codice Fiscale validation, VAT rate warnings, 30 MCP tools
v0.3.0 (current)	SdI lifecycle scope boundary documented, transmission field defaults removed
v0.4.0	CAdES-BES and XAdES digital signatures (smart card, HSM, P12), direct SDI integration (SDICoop SOAP + SFTP)
v0.5.0	Legally compliant archiving, integration with AgID-accredited providers

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Other e-invoicing MCP servers

Country	Server
🌍 Global	mcp-einvoicing-core
🇧🇪 Belgium	mcp-einvoicing-be
🇧🇷 Brazil	mcp-nfe-br
🇫🇷 France	mcp-facture-electronique-fr
🇩🇪 Germany	mcp-einvoicing-de
🇮🇹 Italy	mcp-fattura-elettronica-it
🇵🇱 Poland	mcp-ksef-pl
🇪🇸 Spain	mcp-facturacion-electronica-es

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📄 License

This project is distributed under the Apache 2.0 license. See the LICENSE file for full details.

Copyright 2026 cmendezs

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Project maintained by cmendezs. For questions about the FatturaPA standard implementation, please open an Issue.