Luxembourg Law MCP Server

Luxembourg Law MCP Server

The Legilux (Journal Officiel) alternative for the AI age.

Query 4,551 Luxembourg statutes — from the loi du 1er août 2018 (protection des données) and the Code pénal to the Code du travail, la loi sur les sociétés commerciales, and more — directly from Claude, Cursor, or any MCP-compatible client.

If you're building legal tech, compliance tools, or doing Luxembourg legal research, this is your verified reference database.

Built by Ansvar Systems -- Stockholm, Sweden

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Why This Exists

Luxembourg legal research is scattered across Legilux, the Journal Officiel du Grand-Duché de Luxembourg, EUR-Lex, and bilateral treaty collections. Whether you're:

• A lawyer validating citations in a brief, contract, or société anonyme filing
• A compliance officer checking GDPR obligations or CSSF regulatory requirements
• A legal tech developer building tools on Luxembourg law
• A researcher tracing legislative history from projet de loi to loi publiée

...you shouldn't need a dozen browser tabs and manual PDF cross-referencing. Ask Claude. Get the exact provision. With context.

This MCP server makes Luxembourg law searchable, cross-referenceable, and AI-readable.

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Quick Start

Use Remotely (No Install Needed)

Connect directly to the hosted version — zero dependencies, nothing to install.

Endpoint: https://mcp.ansvar.eu/law-lu/mcp

Claude Desktop — add to claude_desktop_config.json:

{
  "mcpServers": {
    "luxembourg-law": {
      "type": "url",
      "url": "https://mcp.ansvar.eu/law-lu/mcp"
    }
  }
}

GitHub Copilot — add to VS Code settings.json:

{
  "github.copilot.chat.mcp.servers": {
    "luxembourg-law": {
      "type": "http",
      "url": "https://mcp.ansvar.eu/law-lu/mcp"
    }
  }
}

Use Locally (npm)

npx @ansvar/luxembourg-law-mcp

Claude Desktop — add to claude_desktop_config.json:

macOS: ~/Library/Application Support/Claude/claude_desktop_config.json Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "luxembourg-law": {
      "command": "npx",
      "args": ["-y", "@ansvar/luxembourg-law-mcp"]
    }
  }
}

Cursor / VS Code:

{
  "mcp.servers": {
    "luxembourg-law": {
      "command": "npx",
      "args": ["-y", "@ansvar/luxembourg-law-mcp"]
    }
  }
}

Example Queries

Once connected, just ask naturally (les requêtes fonctionnent en français ou en anglais):

• "Que dit l'article 5 de la loi du 1er août 2018 relative à la protection des personnes physiques à l'égard du traitement des données à caractère personnel ?"
• "Rechercher 'protection des données' dans la législation luxembourgeoise"
• "La loi du 2 août 2002 relative à la protection des personnes à l'égard du traitement des données à caractère personnel est-elle toujours en vigueur ?"
• "Quels articles du Code pénal concernent les infractions informatiques ?"
• "Quelles lois luxembourgeoises transposent la directive NIS2 ?"
• "Rechercher les dispositions sur le secret professionnel dans le Code du travail"
• "Validate the citation 'loi du 1er août 2018, art. 62'"
• "Which Luxembourg laws implement the GDPR?"

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What's Included

Verified data only — every citation is validated against official sources (Legilux / Journal Officiel). Zero LLM-generated content.

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Why This Works

Verbatim Source Text (No LLM Processing):

• All statute text is ingested from Legilux (legilux.public.lu) official sources
• Provisions are returned unchanged from SQLite FTS5 database rows
• Zero LLM summarization or paraphrasing — the database contains regulation text, not AI interpretations

Smart Context Management:

• Search returns ranked provisions with BM25 scoring (safe for context)
• Provision retrieval gives exact text by loi date/number + article
• Cross-references help navigate without loading everything at once

Technical Architecture:

Legilux API → Parse → SQLite → FTS5 snippet() → MCP response
                ↑                     ↑
         Provision parser       Verbatim database query

Traditional Research vs. This MCP

Traditional: Search Legilux → Download PDF → Ctrl+F → Cross-reference with Journal Officiel → Check EUR-Lex → Repeat

This MCP: "Quel est le fondement européen de l'article 5 de la loi du 1er août 2018 ?" → Done.

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Available Tools (13)

Core Legal Research Tools (8)

EU Law Integration Tools (5)

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EU Law Integration

Luxembourg is an EU member state and EU founding member. Every major Luxembourg statute in data protection, financial regulation, and telecommunications has a direct EU basis. The EU bridge tools give you full bi-directional lookup.

Key Luxembourg EU Implementations

• Loi du 1er août 2018 — GDPR transposition and national data protection supplement
• Loi du 22 janvier 2021 — Cybersecurity law (NIS Directive transposition)
• Loi du 16 mai 2011 — AML/CFT (successive AMLD transpositions)
• Loi du 5 avril 1993 — Financial sector (MiFID basis, extensively amended)

See EU_INTEGRATION_GUIDE.md for detailed documentation.

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Data Sources & Freshness

All content is sourced from authoritative Luxembourg legal databases:

• Legilux — Journal Officiel du Grand-Duché de Luxembourg (official statute publication)
• EUR-Lex — Official EU law database (metadata only)

Data Provenance

Automated Freshness Checks (Daily)

A daily GitHub Actions workflow monitors Legilux for changes:

Verified data only — every citation is validated against official sources. Zero LLM-generated content.

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Security

This project uses multiple layers of automated security scanning:

See SECURITY.md for the full policy and vulnerability reporting.

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Important Disclaimers

Legal Advice

THIS TOOL IS NOT LEGAL ADVICE

Statute text is sourced from official Legilux publications. However:

• This is a research tool, not a substitute for professional legal counsel
• Court case coverage is limited — do not rely solely on this for case law research
• Verify critical citations against primary sources (Legilux, Journal Officiel) for court filings
• EU cross-references are extracted from statute text and EUR-Lex metadata, not a complete implementation mapping
• Multilingual jurisdiction — Luxembourg law exists in French, German, and Luxembourgish. This database covers French-language legislative texts. Verify against official Legilux publications for other language versions

Before using professionally, read: DISCLAIMER.md | PRIVACY.md

Client Confidentiality

Queries go through the Claude API. For privileged or confidential matters, use on-premise deployment. See PRIVACY.md for guidance consistent with Barreau de Luxembourg / Ordre des Avocats du Barreau de Luxembourg professional conduct standards.

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Development

Setup

git clone https://github.com/Ansvar-Systems/Luxembourg-law-mcp
cd Luxembourg-law-mcp
npm install
npm run build
npm test

Running Locally

npm run dev                                       # Start MCP server
npx @anthropic/mcp-inspector node dist/index.js   # Test with MCP Inspector

Data Management

npm run ingest           # Ingest statutes from Legilux
npm run build:db         # Rebuild SQLite database
npm run drift:detect     # Run drift detection against anchors
npm run check-updates    # Check for amendments

Performance

• Search Speed: <100ms for most FTS5 queries
• Database Size: ~69 MB (efficient, portable)
• Reliability: 100% ingestion success rate across 4,551 statutes

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Related Projects: Complete Compliance Suite

This server is part of Ansvar's Compliance Suite — MCP servers that work together for end-to-end compliance coverage:

@ansvar/eu-regulations-mcp

Query 49 EU regulations directly from Claude — GDPR, AI Act, DORA, NIS2, MiFID II, eIDAS, and more. Full regulatory text with article-level search. npx @ansvar/eu-regulations-mcp

@ansvar/luxembourg-law-mcp (This Project)

Query 4,551 Luxembourg statutes directly from Claude — loi du 1er août 2018, Code pénal, Code du travail, and more. Full provision text with EU cross-references. npx @ansvar/luxembourg-law-mcp

@ansvar/us-regulations-mcp

Query US federal and state compliance laws — HIPAA, CCPA, SOX, GLBA, FERPA, and more. npx @ansvar/us-regulations-mcp

@ansvar/security-controls-mcp

Query 261 security frameworks — ISO 27001, NIST CSF, SOC 2, CIS Controls, SCF, and more. npx @ansvar/security-controls-mcp

70+ national law MCPs covering Austria, Belgium, Czech Republic, Denmark, Estonia, Finland, France, Germany, Ireland, Italy, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland, UK, and more.

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Contributing

Contributions welcome! See CONTRIBUTING.md for guidelines.

Priority areas:

• Court case law expansion (Tribunal administratif, Cour administrative, Cour d'appel)
• CSSF circular and regulation coverage
• German-language text version ingestion
• Historical statute versions and amendment tracking
• EU Regulations MCP integration for full directive text

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Roadmap

• Core statute database with FTS5 search (4,551 statutes, 36,014 provisions)
• EU law integration with bi-directional lookup
• Premium dataset (260 case law, 7 preparatory works, 4,938 agency guidance documents)
• Vercel Streamable HTTP deployment
• npm package publication
• Court case law expansion
• Full EU text integration (via @ansvar/eu-regulations-mcp)
• German-language statute coverage
• Historical statute versions (amendment tracking)
• CSSF and CNPD guidance documents

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Citation

If you use this MCP server in academic research:

@software{luxembourg_law_mcp_2026,
  author = {Ansvar Systems AB},
  title = {Luxembourg Law MCP Server: AI-Powered Legal Research Tool},
  year = {2026},
  url = {https://github.com/Ansvar-Systems/Luxembourg-law-mcp},
  note = {4,551 Luxembourg statutes with 36,014 provisions and EU law cross-references}
}

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License

Apache License 2.0. See LICENSE for details.

Data Licenses

• Statutes & Legislation: Service Central de Législation, Grand-Duché de Luxembourg (public domain)
• EU Metadata: EUR-Lex (EU public domain)

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About Ansvar Systems

We build AI-accelerated compliance and legal research tools for the European market. Luxembourg's unique position as an EU financial and legal hub — hosting major banks, investment funds, and EU institutions — makes it a key jurisdiction for our compliance suite.

So we're open-sourcing it. Navigating 4,551 statutes across a trilingual legal system shouldn't require a law degree.

ansvar.eu -- Stockholm, Sweden

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