lu-eli-mcp

An MCP server for Luxembourg legislation via Legilux open data (data.legilux.public.lu). It fetches act metadata and full Akoma Ntoso text with verifiable citations. Part of the eu-legal-mcp line of national legal connectors by MateMatic.

Legilux is genuinely ELI-native: every act is addressed by its ELI and described as jolux RDF over a FRBR model (Work / Expression / Manifestation), with full text as Akoma Ntoso XML. Every response carries a native eli_uri, a human_readable_citation and a resolvable source_url.

Read-only. The server only queries Legilux and writes a local audit log. It never modifies official text.

Tools

Tool	What it does
lu_get_act(eli)	Metadata for an act by its ELI (full URI or bare eli/... path). Returns the native eli_uri, title, dates, in-force status, available languages / manifestations, and the act's cites / modifies / repeals links.
lu_get_text(eli, language, file_format)	Verbatim text in one language (default fr) and file_format (default xml, Akoma Ntoso).

There is no free-text search: Legilux exposes no HTTP search endpoint. Discover acts by ELI coordinates (from legilux.public.lu) or by following the cites / modifies / repeals ELIs that lu_get_act returns. Luxembourg is multilingual, so titles and text may be French or German; the languages field shows what exists for a given act.

Configuration

Legilux is keyless. Configuration is optional:

Variable	Meaning
LU_ELI_BASE_URL	Legilux data host (default https://data.legilux.public.lu).
LU_ELI_CACHE_DIR	Disk cache dir (default ~/.matematic/cache/lu-eli).
LU_ELI_AUDIT_DIR	Audit log dir (default ~/.matematic/audit).

Copy .mcp.json.example to your MCP client config.

Install

py -3.13 -m venv .venv
.\.venv\Scripts\python.exe -m pip install -e ".[dev]"   # Windows
# or: python -m pip install -e ".[dev]"                  # POSIX

Tests

pytest tests/test_instructions_drift.py tests/test_parse.py   # offline
pytest tests/test_smoke.py -v                                 # live, hits Legilux

Licence

Apache-2.0. Legilux content is © the Grand Duchy of Luxembourg; this software only retrieves and cites it.