mcp-facturacion-electronica-es 🇪🇸

English | Espanol

Introduction

mcp-facturacion-electronica-es is an MCP (Model Context Protocol) server specialized in Spanish e-invoicing. It provides tools to generate, validate, and submit electronic invoices under the six coexisting systems in Spain: VERI*FACTU, Facturae/FACe, SII, TicketBAI (Basque Country), NaTicket (Navarre), and the B2B obligations of Ley 18/2022 "Crea y Crece". The server is built on mcp-einvoicing-core, the shared base library used by mcp-facture-electronique-fr (France, XP Z12-013) and mcp-einvoicing-be (Belgium, Peppol BIS 3.0).

Spain operates one of the most complex e-invoicing landscapes in Europe, with six overlapping systems that apply depending on taxpayer size, sector, and region. VERI*FACTU (Royal Decree 1007/2023, Order HAC/1177/2024) is the forthcoming mandatory real-time invoice registry for non-SII taxpayers, with hard deadlines in January and July 2027 (RD-ley 15/2025). SII (Suministro Inmediato de Informacion, Immediate Information Supply) already applies to large taxpayers (>6M EUR turnover). The Basque Country runs TicketBAI and Navarre runs NaTicket, both independent of the national AEAT framework. B2G invoicing via Facturae XML on the FACe portal has been mandatory since 2015 (Ley 25/2013).

Built on

This package is built on mcp-einvoicing-core, the shared base library used by all MCP servers in the mcp-einvoicing ecosystem. It provides common models, validation abstractions, XML utilities, and the exception hierarchy.

mcp-einvoicing-core is installed automatically as a transitive dependency, no additional steps are required.

Overview

The Spanish e-invoicing ecosystem has six coexisting systems with distinct scopes, formats, and timelines. VERI*FACTU introduces tamper-proof chained invoice records submitted in real time to the AEAT (Agencia Estatal de Administracion Tributaria), applicable to most businesses from 2027 (RD-ley 15/2025). SII is already mandatory for large taxpayers under a 4-day communication window. Facturae XML with XAdES-EPES signing covers all B2G invoicing through the FACe portal. The Basque Country applies TicketBAI independently, with three provincial authorities each maintaining their own XSD schemas and endpoints. Navarre operates NaTicket. The Ley Crea y Crece mandates B2B e-invoicing for all businesses, with the format still pending implementing regulations. Regime detection based on tax domicile and turnover is a prerequisite to all other operations: use es__detect_regional_regime first.

Regulatory coverage

SII / VERI*FACTU mutual exclusion (Real Decreto 254/2025): Taxpayers enrolled in SII are exempt from VERI*FACTU. Use es__check_b2b_mandate_applicability before generating any record.

Tools

VERI*FACTU

es__generate_verifactu_record

Generates a tamper-proof invoice record (Orden HAC/1177/2024) with SHA-256 Huella chaining that links it to the previous record.

{
  "tool": "es__generate_verifactu_record",
  "arguments": {
    "invoice": { "date": "2025-03-15", "number": "2025-0042", "currency": "EUR",
      "seller": { "tax_id": { "country_code": "ES", "identifier": "B12345678" }, "name": "Empresa SL" },
      "buyer":  { "tax_id": { "country_code": "ES", "identifier": "A98765432" }, "name": "Cliente SA" },
      "lines": [{ "line_number": 1, "description": "Servicios", "quantity": 10, "unit_price": 100.00, "vat_rate": 21.0 }]
    },
    "previous_hash": "3C4A9B...", "software_id": "SW-001", "software_nif": "B87654321", "invoice_type": "F1"
  }
}

⚠️ Pending regulatory confirmation: XSD v1.0 (HAC/1177/2024) not yet validated against the AEAT test environment.

es__validate_verifactu_record

Validates a VERI*FACTU XML record against the official XSD published with Orden HAC/1177/2024 (BOE-A-2024-22138).

{ "tool": "es__validate_verifactu_record", "arguments": { "xml": "<RegistroFacturacion>...</RegistroFacturacion>" } }

⚠️ Pending regulatory confirmation

es__submit_verifactu_to_aeat

Submits a signed VERI*FACTU record to the AEAT real-time endpoint via MTLS (FNMT-RCM Class 1 certificate). Respects AEAT_ENV=sandbox|production.

{ "tool": "es__submit_verifactu_to_aeat", "arguments": { "xml": "<RegistroFacturacion>...</RegistroFacturacion>", "nif": "B12345678" } }

⚠️ Pending regulatory confirmation: AuthMode.MTLS is not yet implemented in mcp-einvoicing-core; tracked in the core gaps backlog.

es__generate_qr_verifactu

Generates the mandatory VERI*FACTU QR code (HAC/1177/2024 Art. 10) as a base64-encoded PNG. Encodes the AEAT verification URL with the text "Factura verificable en la sede electronica de la AEAT". Candidate for promotion to mcp-einvoicing-core (QR generation).

{ "tool": "es__generate_qr_verifactu", "arguments": { "nif": "B12345678", "invoice_number": "2025-0042", "invoice_date": "2025-03-15", "total_amount": 1210.00 } }

⚠️ Pending regulatory confirmation

es__cancel_verifactu_record

Generates a VERI*FACTU cancellation record (IndicadorAnulacion=S, TipoHuella=01) chained to the current fingerprint sequence.

{ "tool": "es__cancel_verifactu_record", "arguments": { "original_invoice_number": "2025-0042", "original_invoice_date": "2025-03-15", "issuer_nif": "B12345678", "previous_hash": "3C4A9B..." } }

⚠️ Pending regulatory confirmation

Facturae / FACe

es__generate_facturae_xml

Generates a Facturae 3.2.2 compliant XML invoice for B2G submission. Uses InvoiceDocument from mcp-einvoicing-core.

{ "tool": "es__generate_facturae_xml", "arguments": { "invoice": { "date": "2025-03-15", "number": "2025-0042", "seller": { "tax_id": { "country_code": "ES", "identifier": "B12345678" }, "name": "Proveedor SL" }, "buyer": { "tax_id": { "country_code": "ES", "identifier": "S2800000D" }, "name": "Ayuntamiento de Madrid" }, "lines": [{ "line_number": 1, "description": "Suministro", "quantity": 5, "unit_price": 200.00, "vat_rate": 21.0 }] } } }

⚠️ Pending regulatory confirmation

es__sign_facturae_xades

Applies an XAdES-EPES digital signature (ETSI EN 319 132-1) to a Facturae XML document. Candidate for promotion to mcp-einvoicing-core (XAdES signing, score 3/3).

{ "tool": "es__sign_facturae_xades", "arguments": { "xml": "<Facturae>...</Facturae>", "cert_path": "/certs/empresa.p12", "cert_password": "s3cr3t" } }

⚠️ Pending regulatory confirmation

es__submit_to_face

Submits a signed Facturae XML to FACe (Punto General de Entrada de Facturas Electronicas) via the FACe B2B REST API v2. Requires OAuth2 (FACE_CLIENT_ID / FACE_CLIENT_SECRET).

{ "tool": "es__submit_to_face", "arguments": { "xml": "<Facturae>...</Facturae>", "administrative_unit": "U00000038", "accounting_office": "U00000038", "management_body": "U00000038" } }

⚠️ Pending regulatory confirmation

es__get_face_invoice_status

Queries the processing status of an invoice on FACe. Returns standard status codes: 1200 (Registered), 2400 (Acknowledged), 3100 (Rejected), 4100 (Paid).

{ "tool": "es__get_face_invoice_status", "arguments": { "invoice_id": "FAC-2025-00012345" } }

⚠️ Pending regulatory confirmation

es__validate_facturae_schema

Validates a Facturae XML against the official Facturae 3.2.2 XSD using lxml. Returns structured errors with XPath locations.

{ "tool": "es__validate_facturae_schema", "arguments": { "xml": "<Facturae>...</Facturae>" } }

⚠️ Pending regulatory confirmation

SII (Suministro Inmediato de Informacion)

es__build_sii_invoice_record

Builds an AEAT SII XML record (issued FacturaExpedida or received FacturaRecibida) conforming to the AEAT SII technical guide v3.0 (April 2024). Supports TipoComunicacion A0/A1/A4.

{ "tool": "es__build_sii_invoice_record", "arguments": { "invoice": { "date": "2025-03-15", "number": "2025-0042" }, "record_type": "issued", "communication_type": "A0" } }

⚠️ Pending regulatory confirmation

es__submit_sii_batch

Submits a batch of invoices (up to 10,000 records) to the AEAT SII SOAP endpoint. Requires MTLS.

{ "tool": "es__submit_sii_batch", "arguments": { "records": ["<RegistroLRFacturasEmitidas>...</RegistroLRFacturasEmitidas>"], "record_type": "issued", "fiscal_year": 2025 } }

⚠️ Pending regulatory confirmation: AuthMode.MTLS is not yet implemented in mcp-einvoicing-core.

es__query_sii_status

Queries the status of a submitted SII batch via ConsultaFactInformadasEmitidas or ConsultaFactInformadasRecibidas.

{ "tool": "es__query_sii_status", "arguments": { "batch_id": "SII-BATCH-20250315-001", "record_type": "issued" } }

⚠️ Pending regulatory confirmation

es__generate_sii_correction

Generates an SII modification (A1) or cancellation (A4) record referencing the original invoice via IDFactura. The credit note builder is a candidate for mcp-einvoicing-core (score 3/3).

{ "tool": "es__generate_sii_correction", "arguments": { "original_invoice": { "number": "2025-0042" }, "correction_type": "A1", "record_type": "issued" } }

⚠️ Pending regulatory confirmation

TicketBAI

es__generate_ticketbai_xml

Generates a TicketBAI XML invoice with XAdES signature and HuellaTBAI chain. Automatically selects the correct provincial XSD: Araba v1.2, Gipuzkoa v1.2, Bizkaia v2.1.

{ "tool": "es__generate_ticketbai_xml", "arguments": { "invoice": { "date": "2025-03-15", "number": "2025-0042" }, "province": "gipuzkoa", "software_license": "TBAI-GI-12345", "cert_path": "/certs/empresa.p12", "cert_password": "s3cr3t" } }

⚠️ Pending regulatory confirmation: the three provincial XSDs must be packaged separately; cross-province validation is not permitted.

es__submit_ticketbai

Submits a TicketBAI XML record to the corresponding Basque provincial authority. The endpoint is automatically routed: Araba (batuz.eus), Gipuzkoa (tbai.egoitza.gipuzkoa.eus), Bizkaia (www.bizkaia.eus/ogasun).

{ "tool": "es__submit_ticketbai", "arguments": { "xml": "<T:TicketBai>...</T:TicketBai>", "province": "bizkaia", "nif": "B12345678" } }

⚠️ Pending regulatory confirmation

es__validate_ticketbai_schema

Validates a TicketBAI XML document against the correct provincial XSD. The schemas are not interchangeable between provinces.

{ "tool": "es__validate_ticketbai_schema", "arguments": { "xml": "<T:TicketBai>...</T:TicketBai>", "province": "gipuzkoa" } }

⚠️ Pending regulatory confirmation

Crea y Crece / B2B

es__generate_b2b_einvoice_es

Generates a B2B invoice conforming to EN 16931 in UBL 2.1 or Facturae 3.2.2 format per Ley 18/2022.

{ "tool": "es__generate_b2b_einvoice_es", "arguments": { "invoice": { "date": "2025-03-15", "number": "2025-0042" }, "format": "ubl" } }

⚠️ Pending regulatory confirmation: the B2B mandate implementing regulations have not been published yet.

es__check_b2b_mandate_applicability

Determines the applicable regime (VERI*FACTU, SII, TicketBAI, NaTicket) based on turnover, province code, and SII enrollment. Applies the mutual exclusion logic of Real Decreto 254/2025.

{ "tool": "es__check_b2b_mandate_applicability", "arguments": { "annual_turnover_eur": 2500000, "tax_address_province_code": "28", "enrolled_in_sii": false, "entity_type": "IS" } }

⚠️ Pending regulatory confirmation

Utility tools

es__detect_regional_regime

Detects the applicable e-invoicing regime based on the INE province code. Returns VERIFACTU, TICKETBAI, NATICKET, or VERIFACTU+SII.

Basque provinces: 01 Araba, 20 Gipuzkoa, 48 Bizkaia. Navarre: 31. All others return VERIFACTU. Candidate for promotion to mcp-einvoicing-core.

{ "tool": "es__detect_regional_regime", "arguments": { "province_code": "20", "enrolled_in_sii": false } }

⚠️ Pending regulatory confirmation

es__get_compliance_status

Returns the current mandate deadlines and operating system for a business profile. Reflects RD-ley 15/2025, subject to changes by subsequent legislation. Candidate for promotion to mcp-einvoicing-core (generic deadline registry).

{ "tool": "es__get_compliance_status", "arguments": { "entity_type": "IS", "province_code": "28", "annual_turnover_eur": 1000000, "enrolled_in_sii": false } }

⚠️ Pending regulatory confirmation

es__parse_aeat_response

Parses and normalizes an AEAT XML response (VERI*FACTU or SII) into structured JSON. Extracts EstadoEnvio (Correcto/AceptadoConErrores/Incorrecto), CSV (secure verification code), and error details. Candidate for promotion to mcp-einvoicing-core (generic vendor XML response parser, score 2/3).

{ "tool": "es__parse_aeat_response", "arguments": { "xml": "<RespuestaRegFactuSistemaFacturacion>...</RespuestaRegFactuSistemaFacturacion>", "response_type": "verifactu" } }

⚠️ Pending regulatory confirmation

Installation

From PyPI (recommended)

pip install mcp-facturacion-electronica-es

Without prior installation, using uvx:

uvx mcp-facturacion-electronica-es

From source

git clone https://github.com/cmendezs/mcp-facturacion-electronica-es.git
cd mcp-facturacion-electronica-es
uv sync --all-extras

Configuration

Claude Desktop

{
  "mcpServers": {
    "facturacion-es": {
      "command": "uvx",
      "args": ["mcp-facturacion-electronica-es"],
      "env": {
        "AEAT_ENV": "sandbox",
        "AEAT_CERTIFICATE_PATH": "/path/to/cert.p12",
        "AEAT_CERTIFICATE_PASSWORD": "certificate-password"
      }
    }
  }
}

All configuration is done through environment variables or a .env file.

AEAT / VERI*FACTU / SII

FACe

TicketBAI

Common (inherited from mcp-einvoicing-core)

Architecture

mcp-facturacion-electronica-es is a country adapter within the mcp-einvoicing family, built on mcp-einvoicing-core.

mcp-einvoicing-core (v0.1.0+)
│   BaseDocumentGenerator, BaseDocumentValidator, BaseLifecycleManager
│   InvoiceDocument, InvoiceParty, InvoiceLineItem, VATSummary, PaymentTerms
│   EInvoicingError, ValidationError, XSDValidationError, PlatformError
│   BaseEInvoicingClient, OAuthConfig, AuthMode (OAUTH2 / BEARER / MTLS)
│   get_logger, format_amount, xml_element, format_error
│
├── mcp-facture-electronique-fr    (France — XP Z12-013, Chorus Pro)
├── mcp-einvoicing-be              (Belgium — Peppol BIS 3.0, PINT-BE, Mercurius)
├── mcp-facturacion-electronica-es (Spain — this package)
│   ├── verifactu/   record generation, hash chain, QR, cancellation
│   ├── facturae/    Facturae 3.2.2 XML, XAdES-EPES, FACe submission
│   ├── sii/         batch building, AEAT SOAP, corrections
│   ├── ticketbai/   XML generation, provincial routing, validation
│   ├── b2b/         UBL/Facturae Crea y Crece, mandate detector
│   └── utils/       regime detection, AEAT response parser, deadline registry
├── mcp-fattura-elettronica-it     (Italy — FatturaPA / SDI)
└── mcp-ksef-pl                    (Poland — KSeF / FA(2))

Compliance notes

Notice: Mandate dates reflect RD-ley 15/2025 (December 2025) and are subject to changes by subsequent legislation or AEAT administrative instructions. This software does not constitute legal or tax advice.

Mandate timeline

Regional exceptions

• Basque Country: TicketBAI applies instead of VERI*FACTU. Each of the three provinces (Araba, Gipuzkoa, Bizkaia) has a different XSD, endpoint, and software certification process. National AEAT endpoints do not apply.
• Navarre: NaTicket applies (Hacienda Foral de Navarra). VERI*FACTU does not apply.
• Ceuta / Melilla: IPSI (not VAT); SII/VERI*FACTU applicability differs, verify with the AEAT.
• SII / VERI*FACTU mutual exclusion: Real Decreto 254/2025 makes these systems mutually exclusive. Taxpayers enrolled in SII do not submit VERI*FACTU records.

All AEAT submission endpoints require an FNMT-RCM certificate or one from an accredited CA. The AEAT provides a free test environment at prewww2.aeat.es.

Tests

# Install development dependencies
uv sync --all-extras

# Run the full test suite
uv run pytest tests/ -v

# With coverage report
uv run pytest --cov=mcp_facturacion_electronica_es --cov-report=term-missing

Contributing

Open an issue before starting significant work. For reusable utility logic across country adapters, open a core-promotion issue in mcp-einvoicing-core before implementing it: use the scoring rubric (3 = MUST promote, 2 = SHOULD, 1 = keep here).

git clone https://github.com/cmendezs/mcp-facturacion-electronica-es.git
cd mcp-facturacion-electronica-es
uv sync --all-extras
uv run pytest
make audit

All regulatory assertions must reference a specific BOE publication, an official XSD version, or an AEAT technical guide version. Do not remove ⚠️ Pending regulatory confirmation without linking the verified source in the PR description.

Other e-invoicing MCP servers

License

Released under the Apache License 2.0. Copyright 2025-2026 Christophe Mendez and contributors.