de-eli-mcp

<!-- mcp-name: io.github.matematicsolutions/de-eli-mcp -->

An MCP server for NeuRIS (rechtsinformationen.bund.de), Germany's official federal legal information portal. It searches and retrieves legislation (Gesetze, Verordnungen) with verifiable ELI identifiers and German citations.

Part of the MateMatic eu-legal-mcp production line: the German counterpart of the Polish sejm-eli-mcp, built on the same architecture and citation contract against the German source.

Beta source. NeuRIS is an official but beta service; its dataset is not yet complete. Every response carries a dataset_note saying so. For exhaustive research, cross-check gesetze-im-internet.de / rechtsprechung-im-internet.de.

Licence. German official works - statutes, ordinances, court decisions and official headnotes - are outside copyright under § 5 UrhG (gemeinfrei), which is the standard basis for reusing German legal data. NeuRIS is operated by the BMJV / DigitalService GmbH and publishes no separate API terms or key requirement. This connector only relays that public-domain content, with attribution and a source_url. Caveat: NeuRIS is in test phase; re-check the terms at general availability. (This is a practitioner's read, not formal legal advice.)

The five tools

Tool	What it does
de_search	Search legislation by term, ELI and date (GET /v1/legislation).
de_get_act	Fetch act metadata by ELI.
de_get_text	Fetch the full text (html or xml / LegalDocML.de).
de_list_publishers	List the publication organs (BGBl I/II, Bundesanzeiger).
de_recent_changes	Acts published since a date, newest-first.

Every response carries the contract: eli_uri (e.g. eli/bund/bgbl-1/2017/s2097/2025-01-01/1/deu), human_readable_citation (e.g. BDSG (BGBl I, 2017 2097)), and source_url.

Install

cd de-eli-mcp
pip install -e .

Configure (Claude Code / any MCP client)

Copy .mcp.json.example and adjust if needed:

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

Environment:

• DE_ELI_BASE_URL - default https://testphase.rechtsinformationen.bund.de
• DE_ELI_CACHE_DIR - default ~/.matematic/cache/de-eli
• DE_ELI_AUDIT_DIR - default ~/.matematic/audit

No API key. NeuRIS is keyless.

Governance

• Public data only - read-only against NeuRIS; no client data leaves the machine beyond search parameters.
• Audit log - every tool call appends one JSON line to ~/.matematic/audit/de-eli-mcp.jsonl.
• Vendor-neutral - the server talks only to NeuRIS and the local filesystem; no LLM provider, no telemetry.
• Verifiable citations - every response is independently checkable via source_url.

See CONSTITUTION.md (the binding rules) and DISCOVERY.md (the NeuRIS API map).

Tests

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

Licence

Apache-2.0. © Matematic Solutions / Wieslaw Mazur.