Is Einvoicing Core free?

Yes, Einvoicing Core is free to use.

How do I install Einvoicing Core?

Einvoicing Core is a local plugin. Install it using PyPI package: mcp-einvoicing-core and add the generated configuration snippet to your AI app's MCP config file. Then restart your AI app.

Is Einvoicing Core safe to use?

Einvoicing Core was flagged by MCP Marketplace's security scan, scoring 4.2/10 (high risk). It has 7 high or critical findings to review. Review the security report on this page carefully before installing it.

What AI apps work with Einvoicing Core?

Einvoicing Core uses the Model Context Protocol (MCP) and works with any MCP-compatible AI app, including Claude, ChatGPT / Codex, Gemini, Copilot, Cursor, and more.

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Einvoicing Core MCP Server

by Cmendezs

Developer ToolsUse Caution4.2MCP RegistryLocal

Free

Server data from the Official MCP Registry

Base package for European e-invoicing MCP servers with shared models, XML utils, and OAuth2 client.

About

Base package for European e-invoicing MCP servers with shared models, XML utils, and OAuth2 client.

Security Report

4.2

Use Caution4.2High Risk

This is a well-structured base library for European e-invoicing MCP servers with good code quality and appropriate security practices. The codebase uses safe XML parsing, proper credential handling via environment variables, and implements a layered architecture for shared abstractions. Minor concerns include broad exception handling and limited input validation in some parsers, but these do not represent material security risks given the server's purpose. Supply chain analysis found 12 known vulnerabilities in dependencies (1 critical, 6 high severity). Package verification found 1 issue.

3 files analyzed · 18 issues found

Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.

Permissions Required

This plugin requests these system permissions. Most are normal for its category.

File System Read

Reads files on your machine. Normal for tools that analyze or process local data.

env_vars

Check that this permission is expected for this type of plugin.

HTTP Network Access

Connects to external APIs or services over the internet.

How to Install

Add this to your MCP configuration file:

{
  "mcpServers": {
    "io-github-cmendezs-mcp-einvoicing-core": {
      "args": [
        "mcp-einvoicing-core"
      ],
      "command": "uvx"
    }
  }
}

Documentation

View on GitHub

From the project's GitHub README.

mcp-einvoicing-core

Topics: mcp mcp-server e-invoicing electronic-invoicing python fastmcp peppol en16931 ubl fatturapa xp-z12-013 nfe xml base-library

Base package for electronic invoicing MCP servers.

Provides shared Pydantic models, EN 16931 invoice tree, UBL/CII wire format serializers, an OAuth2 HTTP client, Peppol SMP lookup, digital signature primitives, and a compliance audit framework so country-specific packages share a common foundation without duplicating code.

What this package provides

Module	Contents
`models`	`InvoiceDocument`, `InvoiceParty`, `InvoiceLineItem`, `PartyAddress`, `VATSummary`, `PaymentTerms`, `DocumentValidationResult`, `TaxIdentifier` (per-country tax ID validators: IT, FR, DE, BE, ES, PL, BR), `TaxIdValidationResult`
`en16931`	`EN16931Invoice`, `EN16931Party`, `EN16931LineItem`, `EN16931Address`, `EN16931Tax`, `EN16931AllowanceCharge`, `EN16931PaymentMeans`
`credit_note`	`EN16931CreditNote` (type codes 381/383/384/385), `BillingReference`
`wire_formats`	`EN16931UBLSerializer`, `EN16931UBLParser`, `EN16931CIISerializer`, `EN16931CIIParser`, `UBL_NSMAP`, `CII_NSMAP`
`convert`	`Syntax` (UBL, CII), `convert_wire_format` (auto-detect source, serialize to target)
`base_server`	`EInvoicingMCPServer`, `BaseDocumentGenerator`, `BaseDocumentValidator`, `BaseDocumentParser`, `BaseLifecycleManager`, `BasePartyValidator`, `SubmitResult`, `assert_not_read_only`, `scrub`
`http_client`	`BaseEInvoicingClient` (OAuth2, mTLS, bearer, API key, none), `OAuthConfig`, `OAuthValues`, `TokenCache`, `AuthMode`
`peppol`	`PeppolSMPClient`, `PeppolParticipantId`, `PeppolServiceInfo`, `PeppolLookupResult`, `PeppolEnvironment`, `PEPPOL_BIS_BILLING_30`
`peppol.transport`	`AS4MessageEnvelope`, `AS4TransportClient`, `AS4ReceiptHandler`, `PeppolTransmitter`, `AS4Receipt`, `AS4Credentials` (Peppol AS4 outbound transmission)
`schematron`	`SchematronValidator` (XSLT 1.0), `SaxonSchematronValidator` (XSLT 2.0/3.0, optional `[xslt2]` extra), `load_schematron_validator` (auto-dispatch factory), `get_xslt_version`, `BaseStructuredValidator`, `BaseXSDValidator`, `BaseJSONValidator`, `ValidationMessage`, `ValidationResult`
`digital_signature`	`BaseDocumentSigner`, `XAdESEPESSigner`, `XAdESSignerConfig`, `XMLDSigSigner`, `XMLDSigSignerConfig`
`endpoints`	`BaseEnvironmentEndpoints`, `EndpointSet`, `EndpointEnvironment` (sandbox/production URL routing)
`routing`	`RoutingIdentifier` (static validators: `validate_de_leitweg`), `RoutingIdValidationResult`
`profile_registry`	`ProfileEntry`, `ProfileRegistry`, `profile_registry`, `set_profile_registry`
`pdf`	`PDFEmbedder` (PDF/A-3 XML embedding)
`qr`	`generate_qr_png_base64`
`xml_utils`	`format_amount`, `format_quantity`, `xml_element`, `xml_optional`, `validate_date_iso`, `validate_iban`, `resolve_xml_input`, `mark_untrusted`, `mark_untrusted_fields`, `filter_empty_values`, `format_error`
`download_rules`	`DownloadSpec`, `download_artefacts`
`testing`	`InvoiceFixtureFactory` (shared pytest fixtures)
`audit_log`	`AuditLog`, `AuditAction`, `get_audit_log`
`confirmation`	`ConfirmationGate`, `ConfirmationStore` (human-in-the-loop gate)
`exceptions`	`EInvoicingError`, `ValidationError`, `PartyValidationError`, `XSDValidationError`, `SchematronValidationError`, `DocumentGenerationError`, `AuthenticationError`, `PlatformError`
`logging_utils`	`setup_logging`, `get_logger`
`audit`	Compliance audit framework: `AuditReport`, `CheckResult`, `CheckFinding`, severity constants, `make_report`, `render_summary_table`, `parse_audit_args`, `run_check_core_coverage`, `run_check_version_compatibility`, `run_check_known_shared_helpers`, `TaxRate`, `load_rates` (optional `[audit]` extra)

Installation

pip install mcp-einvoicing-core

For the compliance audit framework (used by country package CI):

pip install mcp-einvoicing-core[audit]

For XSLT 2.0/3.0 Schematron validation (SaxonSchematronValidator — needed for Schematron rule sets using XPath 2.0+ constructs, e.g. FNFE-MPE Factur-X 1.08 / ZUGFeRD):

pip install mcp-einvoicing-core[xslt2]

Architecture

Country packages subclass the core abstractions and register their tools on a shared or standalone MCP server:

mcp-einvoicing-core
  ├── EN16931Invoice / InvoiceDocument  ← canonical invoice models
  ├── EN16931CreditNote                 ← credit note (type codes 381/383/384/385)
  ├── EN16931UBL/CII Serializer/Parser  ← wire format round-trip
  ├── convert_wire_format               ← CII ↔ UBL conversion
  ├── BaseDocumentGenerator/Validator/Parser/LifecycleManager
  ├── BaseEInvoicingClient              ← async HTTP (OAuth2/mTLS/bearer/API key)
  ├── PeppolSMPClient                   ← participant lookup via SMP/SML
  ├── PeppolTransmitter                 ← AS4 outbound transmission
  ├── BaseDocumentSigner                ← XAdES-EPES / XMLDSig
  ├── BaseEnvironmentEndpoints          ← sandbox/production URL routing
  ├── RoutingIdentifier                 ← country-specific routing ID validation
  ├── EInvoicingMCPServer               ← plugin registry wrapping FastMCP
  └── Audit framework                   ← per-package compliance checks

Country packages

Country	Package	Standard
France	`mcp-facture-electronique-fr`	NF XP Z12-012 / NF XP Z12-013 / Factur-X / UBL 2.1 / CII
Germany	`mcp-einvoicing-de`	ZUGFeRD 2.x / XRechnung 3.x
Belgium	`mcp-einvoicing-be`	Peppol BIS 3.0 / PINT-BE
Italy	`mcp-fattura-elettronica-it`	FatturaPA / SDI
Poland	`mcp-ksef-pl`	KSeF FA(3) / FA(2) / Peppol BIS 3.0
Spain	`mcp-facturacion-electronica-es`	Factura-e / VeriFactu / SII / FACe
Brazil	`mcp-nfe-br`	NF-e / NFC-e (modelo 55/65, schema 4.00) / NFS-e Nacional

Plugin registration pattern

Country packages register their tools on a shared or standalone FastMCP instance:

# Standalone
from fastmcp import FastMCP
mcp = FastMCP(name="mcp-fattura-elettronica-it", instructions="...")
register_header_tools(mcp)
register_body_tools(mcp)
register_global_tools(mcp)

# Multi-country (optional EInvoicingMCPServer)
from mcp_einvoicing_core import EInvoicingMCPServer
server = EInvoicingMCPServer(name="mcp-einvoicing-eu", instructions="...")
server.register_plugin(register_header_tools, "it-header")
server.register_plugin(register_flow_tools, "fr-flow")
server.run()

Claude Desktop / Cursor / Kiro compatibility

Existing configurations for country packages require no changes: tool names, signatures, environment variables, and entry points (server:main) are fully preserved.

License

Apache 2.0 -- see LICENSE.

Reviews

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Einvoicing Core MCP Server

About

Security Report

Findings (18)Action required

Permissions Required

How to Install

Documentation

mcp-einvoicing-core

What this package provides

Installation

Architecture

Country packages

Plugin registration pattern

Claude Desktop / Cursor / Kiro compatibility

License

Reviews

No reviews yet

More Developer Tools MCP Servers

Git

Toleno

mcp-creator-python

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