Mcp Einvoicing Core

No install snippet on purpose. A working MCP config is a command, its arguments and an environment block — the last two are where API keys live, so this catalogue never stores them and cannot publish them. Follow the link above for the authors' own instructions.

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`, `BaseScopeInfo`, `SubmissionMetadata`, `SearchCriteria`, `SubmitResult`, `assert_not_read_only`, `scrub`
`http_client`	`BaseEInvoicingClient` (OAuth2, mTLS, bearer, API key, JWS, none), `OAuthConfig`, `OAuthValues`, `JWSConfig`, `APIKeyConfig`, `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`,