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

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.

Quick Start

Use Remotely (No Install Needed)

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

Endpoint: https://luxembourg-law-mcp.vercel.app/mcp

Claude Desktop — add to claude_desktop_config.json:

{
  "mcpServers": {
    "luxembourg-law": {
      "type": "url",
      "url": "https://luxembourg-law-mcp.vercel.app/mcp"
    }
  }
}

GitHub Copilot — add to VS Code settings.json:

{
  "github.copilot.chat.mcp.servers": {
    "luxembourg-law": {
      "type": "http",
      "url": "https://luxembourg-law-mcp.vercel.app/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?"

What's Included

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

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.

Available Tools (13)

Core Legal Research Tools (8)

EU Law Integration Tools (5)

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.

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.

Security

This project uses multiple layers of automated security scanning:

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

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.

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

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.

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

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

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}
}

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)

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