Hungarian Law MCP Server

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One endpoint, one OAuth signup, access from any MCP-compatible client.

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 flow at ansvar.eu/gateway. 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

Category	Count	Details
Statutes	4,314 statutes	Comprehensive Hungarian legislation from njt.hu
Provisions	130,124 sections	Full-text searchable with FTS5
Case Law	11,519 decisions	Court decisions (premium tier)
EU Cross-References	Included	Directives and regulations linked to Hungarian transpositions
Database Size	282 MB	Optimized SQLite, portable
Daily Updates	Automated	Freshness checks against njt.hu

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 Approach	This MCP Server
Search njt.hu by statute title	Search by plain Hungarian: "személyes adat hozzájárulás"
Navigate multi-section statutes manually	Get the exact provision with context
Manual cross-referencing between laws	build_legal_stance aggregates across sources
"Is this statute still in force?" → check manually	check_currency tool → answer in seconds
Find EU basis → dig through EUR-Lex	get_eu_basis → linked EU directives instantly
Check multiple sites for updates	Daily automated freshness checks
No API, no integration	MCP protocol → AI-native

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)

Tool	Description
search_legislation	FTS5 full-text search across 130,124 provisions with BM25 ranking
get_provision	Retrieve specific provision by statute identifier + section/paragraph
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 Hungarian conventions (full/short/pinpoint)
check_currency	Check if statute is in force, amended, or repealed
list_sources	List all available statutes with metadata 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 that underpin a Hungarian statute
get_hungarian_implementations	Find Hungarian laws implementing a specific EU act
search_eu_implementations	Search EU documents with Hungarian implementation counts
get_provision_eu_basis	Get EU law references for a specific provision
validate_eu_compliance	Check implementation status of Hungarian statutes against EU directives

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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.

Metric	Value
EU Member State	Since 2004
Legal System	Civil law (continental European tradition)
Official Gazette	Magyar Közlöny (magyarkozlony.hu)
Legislation Repository	Nemzeti Jogszabálytár (njt.hu)
EUR-Lex Integration	Automated metadata fetching

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:

Source	Check	Method
Statute amendments	njt.hu API date comparison	All 4,314 statutes checked
New statutes	Magyar Közlöny publications (90-day window)	Diffed against database
EU reference staleness	Git commit timestamps	Flagged if >90 days old

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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 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 at ansvar.eu/gateway.

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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_{Built with care in Stockholm, Sweden}