Bulgarian Law MCP Server

The Bulgarian 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.

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 Lex.bg alternative for the AI age.

Query 1,997 Bulgarian statutes -- from the Закон за защита на личните данни (ЗЗЛД) and Наказателен кодекс to the Граждански процесуален кодекс, Търговски закон, and more -- directly from Claude, Cursor, or any MCP-compatible client.

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

Built by Ansvar Systems -- Stockholm, Sweden

Why This Exists

Bulgarian legal research is scattered across Lex.bg, the Държавен вестник (State Gazette), 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 Bulgarian law
• A researcher tracing legislative provisions across 1,997 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 Bulgarian law searchable, cross-referenceable, and AI-readable.

Example Queries

Once connected, just ask naturally:

• "Търсене 'защита на личните данни' -- какви задължения предвижда ЗЗЛД?"
• "Действа ли Наказателният кодекс в актуалния му вид?"
• "Намери разпоредби за търговски дружества в Търговския закон"
• "Кои европейски актове са въведени чрез Закона за електронното управление?"
• "Кои български закони прилагат GDPR?"
• "Потвърди цитат: ЗЗЛД чл. 6, ал. 1"
• "Изгради правна позиция относно задълженията за уведомяване при нарушения на сигурността"
• "Съответства ли българското законодателство на изискванията на NIS2?"

What's Included

Verified data only -- every citation is validated against official sources (parliament.bg, Lex.bg). Zero LLM-generated content.

See It In Action

Why This Works

Verbatim Source Text (No LLM Processing):

• All statute text is ingested from official Bulgarian parliamentary and legislative 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 + article/section reference
• Cross-references help navigate without loading everything at once

Technical Architecture:

parliament.bg / Lex.bg → Parse → SQLite → FTS5 snippet() → MCP response
                            ↑                      ↑
                    Provision parser        Verbatim database query

Traditional Research vs. This MCP

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

This MCP: "Кои разпоредби на ЗЗЛД въвеждат чл. 9 от GDPR за специалните категории данни?" → Done.

Available Tools (13)

Core Legal Research Tools (8)

EU Law Integration Tools (5)

EU Law Integration

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

Key areas of EU-Bulgarian law alignment:

• GDPR (2016/679) -- implemented via the Закон за защита на личните данни (ЗЗЛД, amended 2019)
• NIS2 Directive (2022/2555) -- transposed into Bulgarian cybersecurity legislation
• eIDAS Regulation (910/2014) -- applicable directly; supplemented by the Закон за електронния документ и електронните удостоверителни услуги
• DORA (2022/2554) -- financial sector digital resilience obligations
• AI Act (2024/1689) -- EU regulation applicable directly across all member states
• AML Directives -- implemented via Bulgarian anti-money laundering legislation

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

See EU_INTEGRATION_GUIDE.md for detailed documentation.

Data Sources & Freshness

All content is sourced from authoritative Bulgarian legal databases:

• parliament.bg -- National Assembly of Bulgaria, official legislation database
• Lex.bg -- Consolidated Bulgarian legislation
• Държавен вестник -- Official State 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:

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 Bulgarian legislative publications (parliament.bg, Lex.bg). However:

• This is a research tool, not a substitute for professional legal counsel
• Verify critical citations against primary sources (Държавен вестник) for court filings
• EU cross-references are extracted from Bulgarian statute text, not EUR-Lex full text
• Always confirm current in-force status via Lex.bg 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 Висш адвокатски съвет (Supreme Bar Council of Bulgaria) compliance guidance.

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

Development

Setup

git clone https://github.com/Ansvar-Systems/Bulgarian-law-mcp
cd Bulgarian-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 parliament.bg / Lex.bg
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: 93 MB (efficient, portable)
• Reliability: 100% ingestion success rate

More Ansvar MCPs

Full fleet coverage at ansvar.eu/coverage.

Contributing

Contributions welcome! See CONTRIBUTING.md for guidelines.

Priority areas:

• Court case law expansion (Supreme Court of Cassation, Constitutional Court)
• EU Regulations MCP integration (full EU law text, CJEU case law)
• Historical statute versions and amendment tracking
• Secondary legislation (наредби, правилници)

Roadmap

• Core statute database with FTS5 search

• Full corpus ingestion (1,997 statutes, 17,103 provisions)

• EU law integration tools

• Vercel Streamable HTTP deployment

• Daily freshness checks

• Case law expansion (ВКС, КС)

• Historical statute versions (amendment tracking)

• Secondary legislation expansion

Citation

If you use this MCP server in academic research:

@software{bulgarian_law_mcp_2026,
  author = {Ansvar Systems AB},
  title = {Bulgarian Law MCP Server: Production-Grade Legal Research Tool},
  year = {2026},
  url = {https://github.com/Ansvar-Systems/Bulgarian-law-mcp},
  note = {Comprehensive Bulgarian legal database with 1,997 statutes and 17,103 provisions}
}

License

Apache License 2.0. See LICENSE for details.

Data Licenses

Ansvar attribution code: BG-Statutory-PD. Basis: ZAPSP (Закон за авторското право и сродните му права) Art. 4(1) — broad statutory-PD carve-out covering all four categories of official legal material.

• Statutes & Legislation: Bulgarian National Assembly via parliament.bg API. Reused under ZAPSP Art. 4(1).
• EU Metadata: EUR-Lex (EU public-domain notice).

Coverage scope (broad)

ZAPSP Art. 4(1) is one of the broadest statutory-PD carve-outs in the EU audit. It covers all four standard categories:

• Statutes (закони, постановления, наредби)
• Court decisions (judicial output)
• Administrative-authority decisions
• Preparatory documents

See docs/audits/2026-05-17-eu-copyright-statutory-works-batch-3-BG-HR-SK-SI-SE.md in the Ansvar architecture-documentation repo for the verbatim Art. 4(1) text and the coverage analysis.

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 Bulgarian law -- turns out everyone building for the Bulgarian and EU markets has the same research frustrations.

So we're open-sourcing it. Navigating 1,997 statutes shouldn't require a law degree.

ansvar.eu -- Stockholm, Sweden