MCP E Invoicing Core

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

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Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

{
  "mcpServers": {
    "mcp-e-invoicing-core": {
      "command": "uvx",
      "args": [
        "mcp-einvoicing-core"
      ]
    }
  }
}

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

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, AE, SG, MX, IN), `TaxIdValidationResult`
`en16931`	`EN16931Invoice`, `EN16931Party`, `EN16931LineItem`, `EN16931Address`, `EN16931Tax`, `EN16931AllowanceCharge`, `EN16931PaymentMeans`
`credit_note`	`EN16931CreditNote` (type codes 381/383/384/385), `BillingReference`
`ubl_documents`	`BaseUBLDocument` — shared envelope for non-invoice UBL/Peppol document families (Peppol Ordering, jurisdiction extensions); explicitly outside the `InvoiceDocument`/`EN16931Invoice` tree
`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, JWS, none), `OAuthConfig`, `OAuthValues`, `JWSConfig`, `TokenCache`, `AuthMode`
`peppol`	`PeppolSMPClient`, `PeppolParticipantId`, `PeppolServiceInfo`, `PeppolLookupResult`, `PeppolEnvironment`, `PEPPOL_BIS_BILLING_30`, `resolve_naptr` (standalone U-NAPTR/SML DNS diagnostic)
`peppol.tools`	`register_peppol_tools` (mountable FastMCP plugin: participant lookup, service endpoint, DNS diagnostic, AS4 send, Directory search, plus 8 eDEC code list tools), `default_id_adapter`, `IdentifierAdapter` (national identifier adapter contract)
`peppol.codelists`	`CodeList`, `CodelistNotConfiguredError`, `load_codelist` and the eDEC lookup functions (document types, processes, participant ID schemes, transport profiles, SPIS use cases). Requires `EINVOICING_PEPPOL_CODELIST_DIR`, see Configuration below
`genericode`	`parse_genericode`, `CodeList`, `CodelistNotConfiguredError` — shared OASIS Genericode 1.0 parser (used by `peppol.codelists` and `en16931_codelists`)
`en16931_codelists`	`en16931_codelist_tools.register_en16931_codelist_tools` (mountable FastMCP plugin: country, currency, ICD, UNCL1001/1153/4461/5305, allowance/item/charge reason, MIME, EAS, VATEX lookup). Requires `EINVOICING_EN16931_CODELIST_DIR`, see Configuration below
`peppol.directory`	`PeppolDirectoryClient` (public Peppol Directory REST search, no auth), `PeppolDirectorySearchResult`, `PeppolBusinessCard`, `PeppolBusinessEntity`
`peppol.transport`	`AS4MessageEnvelope`, `AS4TransportClient`, `AS4ReceiptHandler`, `PeppolTransmitter`, `AS4Receipt`, `AS4Credentials` (Peppol AS4 outbound transmission, now with real WS-Security message signing); `AS4InboundHandler`, `AS4InboundMessage`, `AS4InboundError`, `StandardBusinessDocumentHeader` (AS4 inbound receiver, C3 role); `sign_as4_message`, `verify_as4_signature` (WS-Security primitives)
`peppol.trust`	`PeppolTrustStore`, `validate_certificate_chain`, `check_revocation`, `verify_smp_signature` — OpenPeppol PKI chain/revocation/signature validation. Requires `EINVOICING_PEPPOL_PKI_DIR` (root certs not yet published by OpenPeppol as of this release — logic-only until supplied)
`peppol.reporting`	`parse_eusr`, `parse_tsr`, `validate_eusr`, `validate_tsr` — Peppol EUSR/TSR service-provider statistics report models and validation (bundled XSD + Schematron, optional `[xslt2]` extra)
`peppol.mls`	`parse_mls`, `validate_mls`, `build_mls` — Peppol Message Level Status (MLS) model and validation (bundled Schematron, optional `[xslt2]` extra)
`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`, `XSDValidator` (generic concrete XSD validator), `BaseJSONValidator`, `ValidationMessage`, `ValidationResult`
`schematron_artifacts`	`en16931_base_schematron_validator` (bundled, compiled CEN EN16931 base Schematron — `BR-*` rules only, no Peppol overlay; optional `[xslt2]` extra)
`digital_signature`	`BaseDocumentSigner`, `XAdESEPESSigner`, `XAdESSignerConfig`, `XMLDSigSigner`, `XMLDSigSignerConfig`, `CAdESSigner`, `CAdESSignerConfig`, `SelloDigitalSigner`, `SelloDigitalSignerConfig`, `load_certificate_der`
`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); `extract(filename=None)` tries canonical Factur-X/XRechnung/ZUGFeRD filenames in turn, `identify()` reads XMP to detect a hybrid PDF and its conformance level
`pdf_tools`	`register_pdf_tools` (mountable FastMCP plugin: `identify_and_extract_pdf`), `identify_and_extract_pdf`
`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)

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Frequently Asked Questions about MCP E Invoicing Core

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "mcp-e-invoicing-core": { "command": "npx", "args": ["-y", "MCP E-Invoicing Core"] } }

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Technical Specs & Signals

CategoryDeveloper Tools

36Quality signal: Fair · 36/100How this signal is calculated ▾

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