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

Client	How to Connect
Claude.ai	Settings > Connectors > Add Integration > paste URL
Claude Code	claude mcp add luxembourg-law --transport http https://mcp.ansvar.eu/law-lu/mcp
Claude Desktop	Add to config (see below)
GitHub Copilot	Add to VS Code settings (see below)

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

Category	Count	Details
Statutes	4,551 lois	Comprehensive Luxembourg legislation from Legilux
Provisions	36,014 articles	Full-text searchable with FTS5
Premium: Case law	260 judgments	Tribunal et Cour d'appel decisions
Premium: Preparatory works	7 documents	Projets de loi and exposés des motifs
Premium: Agency guidance	4,938 documents	CNPD, CSSF, and ministerial circulars
Database Size	~69 MB	Optimized SQLite, portable
Daily Updates	Automated	Freshness checks against Legilux

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 Approach	This MCP Server
Search Legilux by date de publication	Search by plain French: "protection données consentement"
Navigate multi-chapter statutes manually	Get the exact provision with context
Manual cross-referencing between lois	build_legal_stance aggregates across sources
"Cette loi est-elle toujours en vigueur ?" → check manually	check_currency tool → answer in seconds
Find EU basis → dig through EUR-Lex	get_eu_basis → linked EU directives instantly
No API, no integration	MCP protocol → AI-native

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)

Tool	Description
search_legislation	FTS5 full-text search across 36,014 provisions with BM25 ranking. Supports quoted phrases, boolean operators, prefix wildcards
get_provision	Retrieve specific provision by statute reference + article number
check_currency	Check if a statute is in force, amended, or repealed
validate_citation	Validate citation against database — zero-hallucination check
build_legal_stance	Aggregate citations from multiple statutes for a legal topic
format_citation	Format citations per Luxembourg conventions (full/short/pinpoint)
list_sources	List all available statutes with metadata, coverage scope, and data provenance
about	Server info, capabilities, dataset statistics, and coverage summary

EU Law Integration Tools (5)

Tool	Description
get_eu_basis	Get EU directives/regulations underlying a Luxembourg statute
get_luxembourg_implementations	Find Luxembourg laws implementing a specific EU act
search_eu_implementations	Search EU documents with Luxembourg implementation counts
get_provision_eu_basis	Get EU law references for a specific provision
validate_eu_compliance	Check implementation status of Luxembourg statutes against EU directives

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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.

Metric	Value
EU Member State	Yes — founding member
EU References	Cross-references linking Luxembourg statutes to EU law
Directives transposed	GDPR, NIS2, DORA, AI Act, eIDAS, AML directives, and more
EUR-Lex Integration	Automated metadata fetching
CSSF supervision	Financial sector EU regulatory framework fully covered

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

Field	Value
Authority	Service Central de Législation, Grand-Duché de Luxembourg
Retrieval method	Legilux official database
Languages	French (primary legislative language); German and Luxembourgish also official
License	Public domain (données publiques gouvernementales)
Coverage	4,551 statutes, 36,014 provisions
Last ingested	2026-02-28

Automated Freshness Checks (Daily)

A daily GitHub Actions workflow monitors Legilux for changes:

Check	Method
Statute amendments	Legilux date comparison across 4,551 statutes
New statutes	Journal Officiel publication monitoring
Repealed statutes	Status change detection
EU reference staleness	Git commit timestamps — flagged if >90 days old

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:

Scanner	What It Does	Schedule
CodeQL	Static analysis for security vulnerabilities	Weekly + PRs
Semgrep	SAST scanning (OWASP top 10, secrets, TypeScript)	Every push
Gitleaks	Secret detection across git history	Every push
Trivy	CVE scanning on filesystem and npm dependencies	Daily
Docker Security	Container image scanning + SBOM generation	Daily
Socket.dev	Supply chain attack detection	PRs
OSSF Scorecard	OpenSSF best practices scoring	Weekly
Dependabot	Automated dependency updates	Weekly

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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