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nu:legal Deutsches Recht

Official registry Government and legal

German federal and Land statutes plus court decisions for agents. Keyless, read-only.

Source code Website Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http nu-legal-deutsches-recht 'https://recht.nulegal.eu/v1/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "nu-legal-deutsches-recht": {
            "type": "http",
            "url": "https://recht.nulegal.eu/v1/mcp"
        }
    }
}

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. recht-mcp
  2. The nine tools
  3. Use the hosted server (recommended)
  4. Run it locally
  5. Development
  6. Data
  7. Contributing and security
  8. License

recht-mcp

An MCP server for German law: federal statutes and regulations, the Landesrecht of Bayern, Brandenburg, Nordrhein-Westfalen and Sachsen, and court decisions — for AI agents that need to ground a citation, read a provision, or follow the citation graph, and need to know when an answer is not complete.

On 23 October 2026 the corpus held 12,016 statutes and regulations (254,598 provisions, 312,122 stored versions) and 640,401 court decisions from 946 courts, with 7,797,118 citation links from decisions to provisions and to other decisions. getCoverage returns the current figures.

This repository is the tool layer of the hosted server at https://recht.nulegal.eu/v1/mcp. The hosted endpoint runs this code, vendored at a pinned commit, over a private backend that reads the corpus directly; recht-mcp runs the same code locally over the public REST API. The corpus and the database stay on the service side — see docs/DESIGN.md for exactly where the line runs.

The nine tools

ToolWhat it does
resolveIdentifiersGrounds up to 100 citations at once — § 823 Abs. 1 BGB, BVerwG, Urteil vom 24.10.2023 - 2 C 9.22, ECLIs, BVerfGE 65, 1. Keeps the court and the date as disambiguators, flags a wrong date or a different court, and never returns a near match.
searchOne query over statutes (lexical) and case law (semantic), with a per-jurisdiction roll-up for cross-Land comparison.
getNormThe text of one provision as Markdown (or JSON), optionally as of a date, with its gazette citation (fundstelle).
listNormVersionsEvery stored version of a provision, with the archive floor marked.
listCitingDecisionsDecisions citing a provision or a decision, by citation weight or newest first, with the citing court's own Randnummer.
listCitedAuthoritiesWhat one decision cites: provisions (the weighted Normenkette) and decisions.
listCasePassagesA decision as numbered passages; page through it or jump to a Randnummer.
getChangesProvisions whose text changed recently — the freshness feed as JSON.
getCoverageWhat the corpus holds, and the limits every answer should be read against.

Every tool is read-only. Each answer says what it is and what it is not: version dates are first-observed dates, not Inkrafttreten; the norm-version archive has a floor that every norm answer states; a zero from the citation graph on a Land provision is labelled as "not indexed", not "never cited"; and three kinds of miss — not_in_corpus, outside_coverage, known_missing — are never collapsed into one. The full contract of each tool is in its description (tools/list).

No key, no signup. Point any MCP client that speaks Streamable HTTP at:

https://recht.nulegal.eu/v1/mcp

Claude Code:

claude mcp add --transport http nulegal-recht https://recht.nulegal.eu/v1/mcp

A client configured with JSON:

{
  "mcpServers": {
    "nulegal-recht": { "type": "http", "url": "https://recht.nulegal.eu/v1/mcp" }
  }
}

Developer documentation for the service and its REST API: https://recht.nulegal.eu/developers.

Run it locally

Requires Python 3.12+ and uv. The package has no third-party runtime dependencies.

git clone https://github.com/nulegal-startup/recht-mcp cd recht-mcp uv run recht-mcp # stdio uv run recht-mcp --http # Streamable HTTP on http://127.0.0.1:8765/mcp

Or without a checkout:

uvx --from git+https://github.com/nulegal-startup/recht-mcp recht-mcp

A client that launches stdio servers:

{
  "mcpServers": {
    "nulegal-recht": {
      "command": "uvx",
      "args": ["--from", "git+https://github.com/nulegal-startup/recht-mcp", "recht-mcp"]
    }
  }
}

Options: --http, --host (default 127.0.0.1), --port (default 8765), --path (default /mcp), --base-url (or RECHT_MCP_BASE_URL; default https://recht.nulegal.eu), --timeout, --log-level. The local HTTP server binds to loopback and refuses browser requests from non-loopback origins.

The local server reads the same data the hosted one does, through the public REST API, and gives the same answers with two documented exceptions (a simplified citation grammar, and no other_laws hint on a provision miss) — see docs/DESIGN.md.

Development

uv sync uv run pytest -q # unit tests, offline RECHT_MCP_LIVE=1 uv run pytest -q tests/test_live.py # against recht.nulegal.eu

The live tests call every tool through the local server and compare several answers with the hosted endpoint's.

Data

The legal corpus served by the hosted endpoint — its structure and selection, the links between provisions and decisions, the version history — is licensed separately from this code, under CC BY 4.0. Attribution is required: „Quelle: nu:legal – recht.nulegal.eu“. The terms, including what is reserved, are at https://recht.nulegal.eu/lizenz and https://recht.nulegal.eu/nutzungsbedingungen.

The texts are non-official reading copies. The binding text of a statute is the one in its official gazette; each norm answer names it (fundstelle, authoritative_source).

Contributing and security

Issues are welcome; outside pull requests are not accepted yet — see CONTRIBUTING.md. Report vulnerabilities privately as described in SECURITY.md.

License

The code in this repository is licensed under the GNU Affero General Public License, version 3 only (AGPL-3.0-only) — see LICENSE.

The legal corpus served by the hosted endpoint is licensed separately, under CC BY 4.0 with attribution required (see Data).

The nu:legal name and logo are not licensed.

Frequently asked questions

What is nu:legal Deutsches Recht?

German federal and Land statutes plus court decisions for agents. Keyless, read-only.

How do I install nu:legal Deutsches Recht?

It runs as a remote server. In Claude Code: claude mcp add --transport http nu-legal-deutsches-recht 'https://recht.nulegal.eu/v1/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does nu:legal Deutsches Recht need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is nu:legal Deutsches Recht open source?

Yes. Its code is on GitHub under the AGPL-3.0 license.

Who maintains nu:legal Deutsches Recht?

It is published by nulegal-startup. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.