Hungarian Law MCP Server

Hungarian Law MCP Server

The Hungarian law corpus is now served through the Ansvar Gateway. Connect your AI assistant (Claude, Copilot, Cursor, custom MCP client) to https://gateway.ansvar.eu/mcp — one OAuth connection, free tier available, covering this corpus plus EU regulations, national law across dozens of audited jurisdictions (Europe + the US), and CVE/security intelligence, every result with a verbatim source citation. Start at https://ansvar.eu/docs/quickstart

Connect

Claude Code (one line):

claude mcp add ansvar --transport http https://gateway.ansvar.eu/mcp

Claude Desktop / Cursor — add to claude_desktop_config.json (or mcp.json):

{
  "mcpServers": {
    "ansvar": {
      "type": "url",
      "url": "https://gateway.ansvar.eu/mcp"
    }
  }
}

Claude.ai — Settings → Connectors → Add custom connector → paste https://gateway.ansvar.eu/mcp

First request opens an OAuth signup flow (setup details: ansvar.eu/docs/quickstart). After signup, your client is bound to your account; tier (free / premium / team / company) determines fan-out, quota, and which downstream MCPs are reachable.

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Self-host this MCP

You can also clone this repo and build the corpus yourself. The schema, fetcher, and tool implementations all live here. What is not in the repo is the pre-built database — TDM and standards-licensing constraints on the upstream sources mean we host the corpus on Ansvar infrastructure rather than redistribute it as a public artifact.

Build your own: run this repo's ingestion script (entry-point varies per repo — typically scripts/ingest.sh, npm run ingest, or make ingest; check the repo root).

The Magyar Közlöny alternative for the AI age.

Query 4,314 Hungarian statutes -- from the GDPR végrehajtási törvény and Büntető Törvénykönyv to the Polgári Törvénykönyv, Munka Törvénykönyve, and more -- directly from Claude, Cursor, or any MCP-compatible client.

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

Built by Ansvar Systems -- Stockholm, Sweden

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Why This Exists

Hungarian legal research is scattered across njt.hu (Nemzeti Jogszabálytár), Magyar Közlöny publications, and EUR-Lex. Whether you're:

• A lawyer validating citations in a brief or contract
• A compliance officer checking if a statute is still in force
• A legal tech developer building tools on Hungarian law
• A researcher tracing legislative provisions across 4,314 statutes

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

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

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Example Queries

Once connected, just ask naturally:

• "Keresés 'adatvédelem' -- milyen kötelezettségeket állapít meg a GDPR végrehajtási törvény?"
• "Hatályban van-e a Büntető Törvénykönyv 370. §-a?"
• "Találj rendelkezéseket a munkavállalók védelméről a Munka Törvénykönyvében"
• "Melyik uniós irányelvet ültette át a Polgári Törvénykönyv fogyasztóvédelmi fejezete?"
• "Melyik magyar törvények ültetik át a GDPR-t?"
• "Ellenőrizd a hivatkozást: Btk. 370. § (1) bek."
• "Állíts össze jogi álláspontot az adatvédelmi incidensek bejelentési kötelezettségéről"
• "Megfelel-e a magyar kibervédelmi törvény a NIS2 irányelv követelményeinek?"

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What's Included

Verified data only -- every citation is validated against official sources (njt.hu, Magyar Közlöny). Zero LLM-generated content.

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See It In Action

Why This Works

Verbatim Source Text (No LLM Processing):

• All statute text is ingested from njt.hu (Nemzeti Jogszabálytár) official sources
• Provisions are returned unchanged from SQLite FTS5 database rows
• Zero LLM summarization or paraphrasing -- the database contains statute text, not AI interpretations

Smart Context Management:

• Search returns ranked provisions with BM25 scoring (safe for context)
• Provision retrieval gives exact text by statute identifier + section
• Cross-references help navigate without loading everything at once

Technical Architecture:

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

Traditional Research vs. This MCP

Traditional: Search njt.hu → Download PDF → Ctrl+F → Cross-reference → Check EUR-Lex for EU basis → Repeat

This MCP: "Melyik GDPR-cikk ültette át a különleges adatkezelési kategóriákra vonatkozó 9. §-t?" → 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

Hungary is an EU member state. Hungarian legislation directly transposes EU directives and implements EU regulations, creating a traceable mapping between Hungarian and EU law.

Key areas of EU-Hungarian law alignment:

• GDPR (2016/679) -- implemented via the 2018. évi XXXVIII. törvény (információs önrendelkezési jogról és az információszabadságról szóló törvény módosítása)
• NIS2 Directive (2022/2555) -- transposed into Hungarian cybersecurity legislation (kibervédelmi törvény)
• eIDAS Regulation (910/2014) -- applicable directly; supplemented by Hungarian electronic identification rules
• DORA (2022/2554) -- digital operational resilience obligations for the financial sector
• AI Act (2024/1689) -- EU regulation applicable directly across all member states
• Consumer Protection Directives -- implemented via the Fogyasztóvédelmi törvény

The EU bridge tools provide bi-directional lookup: find which Hungarian statutes implement a given EU act, or find which EU acts underpin a given Hungarian provision.

See EU_INTEGRATION_GUIDE.md for detailed documentation.

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Data Sources & Freshness

All content is sourced from authoritative Hungarian legal databases:

• njt.hu -- Nemzeti Jogszabálytár (National Legislation Repository), the official consolidated Hungarian legal database
• Magyar Közlöny -- Official Gazette (primary legislative publication)
• EUR-Lex -- Official EU law database (metadata only)

Automated Freshness Checks (Daily)

A daily GitHub Actions workflow monitors all data sources:

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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 njt.hu/Magyar Közlöny publications. However:

• This is a research tool, not a substitute for professional legal counsel
• Verify critical citations against primary sources for court filings
• EU cross-references are extracted from Hungarian statute text, not EUR-Lex full text
• Always confirm current in-force status via njt.hu before relying on a provision professionally

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 Magyar Ügyvédi Kamara (Hungarian Bar Association) compliance guidance.

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Documentation

• EU Integration Guide -- Detailed EU cross-reference documentation
• EU Usage Examples -- Practical EU lookup examples
• Security Policy -- Vulnerability reporting and scanning details
• Disclaimer -- Legal disclaimers and professional use notices
• Privacy -- Client confidentiality and data handling

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Development

Setup

git clone https://github.com/Ansvar-Systems/Hungarian-law-mcp
cd Hungarian-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 njt.hu
npm run build:db            # Rebuild SQLite database
npm run check-updates       # Check for amendments and new statutes

Performance

• Search Speed: <100ms for most FTS5 queries
• Database Size: 282 MB (comprehensive corpus)
• Reliability: 100% ingestion success rate

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More Ansvar MCPs

Full fleet coverage at ansvar.eu/coverage.

Contributing

Contributions welcome! See CONTRIBUTING.md for guidelines.

Priority areas:

• Court case law expansion (Kúria, Constitutional Court)
• EU Regulations MCP integration (full EU law text, CJEU case law)
• Historical statute versions and amendment tracking
• Government decrees (kormányrendeletek) expansion

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Roadmap

• Core statute database with FTS5 search

• Full corpus ingestion (4,314 statutes, 130,124 provisions)

• Case law database (11,519 decisions, premium tier)

• EU law integration tools

• Vercel Streamable HTTP deployment

• Daily freshness checks

• Case law expansion (Kúria full archive)

• Historical statute versions (amendment tracking)

• Government decree expansion

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Citation

If you use this MCP server in academic research:

@software{hungarian_law_mcp_2026,
  author = {Ansvar Systems AB},
  title = {Hungarian Law MCP Server: Production-Grade Legal Research Tool},
  year = {2026},
  url = {https://github.com/Ansvar-Systems/Hungarian-law-mcp},
  note = {Comprehensive Hungarian legal database with 4,314 statutes and 130,124 provisions}
}

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License

Apache License 2.0. See LICENSE for details.

Data Licenses

Ansvar attribution code: Hungarian-Szjt-Section-1-4. Basis: Szjt. (Act LXXVI of 1999 on Copyright) §1(4) — broad statutory-PD carve-out for legislative and administrative materials.

• Statutes & Legislation: Nemzeti Jogszabálytár (NJT) — canonical portal at njt.jog.gov.hu (migrated from njt.hu). Reused under Szjt. §1(4).
• EU Metadata: EUR-Lex (EU public-domain notice).

Coverage scope

Hungarian Szjt. §1(4) is a broad statutory-PD carve-out covering legislative acts, administrative acts, official decisions, and other official documents.

See docs/audits/2026-05-17-eu-copyright-statutory-works-batch-2-HU-LU-PT-RO-GR.md in the Ansvar architecture-documentation repo for the verbatim §1(4) text and the coverage analysis.

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About Ansvar Systems

We build AI-accelerated compliance and legal research tools for the European market. This MCP server started as our internal reference tool for Hungarian law -- turns out everyone building for the Hungarian and Central European markets has the same research frustrations.

So we're open-sourcing it. Navigating 4,314 statutes shouldn't require a law degree.

ansvar.eu -- Stockholm, Sweden

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