De Eli

Instalacja (jedna komenda)

Opublikowany na PyPI + MCP Registry (io.github.matematicsolutions/de-eli-mcp). Uruchomienie bez klonowania:

uvx de-eli-mcp

Konfiguracja klienta MCP (stdio):

{ "mcpServers": { "de-eli-mcp": { "command": "uvx", "args": ["de-eli-mcp"] } } }

(Budowanie ze źródeł — niżej.)

An MCP server for German law: NeuRIS (rechtsinformationen.bund.de) for federal legislation, three case-law sources - NeuRIS's beta case-law slice, the complete federal-courts aggregator rechtsprechung-im-internet.de (RII, official BMJ/juris portal) for BVerfG, BGH, BAG, BFH, BVerwG, BSG (+ BPatG), and Open Legal Data (de.openlegaldata.io, ~424k decisions from ~1 100 courts of ALL levels, including the state courts of all 16 Laender, with full-text search) - plus the Bundestag's DIP (dip.bundestag.de) for parliamentary documents and legislative history (~287k Drucksachen with full text, plenary transcripts, ~335k legislative procedures, Bundestag AND Bundesrat).

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 (legislation + de_case_search). NeuRIS is an official but beta service; its dataset is not yet complete. Every response carries a dataset_note saying so.

Complete source (case law). de_rii_case_search / de_rii_get_case_text query rechtsprechung-im-internet.de directly. Per an independent audit (Legal Data Hunter, worldwidelaw/legal-sources), RII's coverage of BVerfG, BGH, BAG, BFH, BVerwG and BSG is marked status: complete - unlike NeuRIS's /v1/case-law, which only carries a small beta slice (and can drop fields such as ecli for the very same decision RII serves with a full ECLI - see BAG decision KARE600069049 / ECLI:DE:BAG:2024:... as a live example). Prefer the RII tools for these six courts.

State courts + full-text search (Open Legal Data). de_oldp_case_search / de_oldp_get_case query de.openlegaldata.io - a community open-data aggregator (Open Knowledge Foundation ecosystem, BMBF Prototypefund) of ~424k decisions from ~1 100 German courts at every level, including the state courts of all 16 Laender. It is NOT an official government service and does not claim completeness - for the six federal supreme courts prefer the RII tools; use OLDP for state case law and for full-text hunting (no other source here searches decision content).

Legislative history (Bundestag DIP). de_dip_search / de_dip_get_document query the parliament's official DIP API - Drucksachen (bills, motions, committee reports, government answers - the home of Gesetzesbegruendungen), plenary transcripts and legislative procedures, for Bundestag and Bundesrat. The Bundestag publishes a public API key on its help page (the current one is valid until end of May 2027 and ships as the default); set DE_DIP_API_KEY when it rotates or to use your own key.

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; RII is operated by the BMJ (juris GmbH). Neither publishes a separate API terms or key requirement. Open Legal Data's database is under ODbL v1.0 (the decisions themselves are gemeinfrei); DIP data is under Data licence Germany - attribution - 2.0 (dl-de/by-2-0). This connector only relays that public 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 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.
de_case_search / de_get_decision(_text)	NeuRIS case-law beta slice (/v1/case-law).
de_rii_case_search	Search BVerfG/BGH/BAG/BFH/BVerwG/BSG/BPatG decisions via RII's master TOC (court, Aktenzeichen substring, date range).
de_rii_get_case_text	Full text of one RII decision by doc_id - real ecli when the court publishes one, plus titelzeile/leitsatz/tenor/full content.
de_oldp_case_search	Search Open Legal Data - 423 944 decisions from 1 119 courts at all levels (verified live 2026-07-08), the only tool here covering state courts and offering full-text search (text). Metadata filters: court_slug, file_number (exact), date_after/date_before.
de_oldp_get_case	Full decision text (HTML) by OLDP id or slug, with ECLI when the source carries one.
de_dip_search	Search the Bundestag DIP - Drucksachen (287 327), Plenarprotokolle (5 789), Vorgaenge (334 524); filters titel, dokumentnummer, zuordnung (BT/BR), wahlperiode, dates; cursor pagination.
de_dip_get_document	One DIP entity by id; the -text resource variants return the full document text. Citations like BT-Drs. 20/1 with the official PDF as source_url.

Every response carries the contract: eli_uri (ELI e.g. eli/bund/bgbl-1/2017/s2097/2025-01-01/1/deu, or ECLI for RII case law e.g. ECLI:DE:BVerfG:2024:rk20241120.1bvr226823), human_readable_citation (e.g. BDSG (BGBl I, 2017 2097) or BVerfG, Kammerbeschluss vom 20.11.2024 - 1 BvR 2268/23), 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_RII_BASE_URL - default https://www.rechtsprechung-im-internet.de
• DE_OLDP_BASE_URL - default https://de.openlegaldata.io
• DE_DIP_BASE_URL - default https://search.dip.bundestag.de
• DE_DIP_API_KEY - default: the public key the Bundestag documents on dip.bundestag.de/über-dip/hilfe/api (valid until end of May 2027; rotates ~yearly)
• DE_ELI_CACHE_DIR - default ~/.matematic/cache/de-eli
• DE_ELI_AUDIT_DIR - default ~/.matematic/audit

NeuRIS, RII and Open Legal Data are keyless. DIP needs an API key, but the Bundestag publishes a public one (shipped as the default) - zero setup either way.

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]"
# offline (fixtures)
pytest tests/test_instructions_drift.py tests/test_rii_client.py tests/test_oldp_client.py tests/test_dip_client.py -v
# live smokes (NeuRIS + RII + Open Legal Data + DIP)
pytest tests/test_smoke.py -v

Licence

Apache-2.0. © Matematic Solutions / Wieslaw Mazur.