dk-eli-mcp

An MCP server for the Danish Retsinformation legal database (retsinformation.dk). It fetches Danish legislation as LexDania 2.1 XML behind native ELI URIs, with verifiable citations.

Part of the MateMatic eu-legal-mcp production line - after PL, DE, AT, ES, FI, IE, NL, SE, FR and LU. Same citation contract, Retsinformation source. Denmark is ELI-native: every document has a stable data.europa.eu/eli-typed identifier exposed as a retsinformation.dk/eli/... URL.

Scope. This MVP grounds Danish documents by ELI coordinate (year + number in the lta collection = Lovtidende A) or by accession number, and lists documents changed on a date. The API is path-based, not keyword search. It covers laws (LOV), consolidated laws (LBK), executive orders (BEK), circulars (CIR) and guidelines (VEJ). Language: Danish. Every response carries a dataset_note.

Licence of the data. Danish legislation in Retsinformation is official public information published as Open Data (keyless). This connector relays it with attribution and a source_url.

The tools

Every response carries the contract: eli_uri (a full ELI URL, e.g. https://www.retsinformation.dk/eli/lta/2018/502), human_readable_citation (e.g. Databeskyttelsesloven (LOV nr. 502 af 23/05/2018)), and source_url.

Related MCP server: Icelandic Law MCP

Install

Run it with no install step (once published to PyPI):

uvx dk-eli-mcp

Or from source:

cd dk-eli-mcp
pip install -e .

Configure (Claude Code / any MCP client)

{
  "mcpServers": {
    "dk-eli-mcp": { "command": "dk-eli-mcp" }
  }
}

Environment:

• DK_ELI_BASE_URL - default https://www.retsinformation.dk

• DK_ELI_API_URL - default https://api.retsinformation.dk (harvest API)

• DK_ELI_CACHE_DIR - default ~/.matematic/cache/dk-eli

• DK_ELI_AUDIT_DIR - default ~/.matematic/audit

No API key. Retsinformation open data is keyless.

The harvest API behind dk_recent_changes is only available 03:00-23:45 Danish time. Outside that window the tool returns an upstream_error; an empty list during the window means nothing changed on that date.

Governance

• Public data only - read-only against Retsinformation; no client data leaves the machine.

• Audit log - every tool call appends one JSON line to ~/.matematic/audit/dk-eli-mcp.jsonl.

• Vendor-neutral - talks only to retsinformation.dk; no LLM provider, no telemetry.

• Verifiable citations - every response is independently checkable via source_url.

See CONSTITUTION.md and DISCOVERY.md.

Tests

pip install -e ".[dev]"
pytest tests/test_instructions_drift.py tests/test_parse.py -v   # offline
pytest tests/test_smoke.py -v                                    # hits live Retsinformation

Licence

Apache-2.0. © Matematic Solutions / Wieslaw Mazur.