Bulgarian Law MCP Server

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

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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.

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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-bg/mcp

Client	How to Connect
Claude.ai	Settings > Connectors > Add Integration > paste URL
Claude Code	claude mcp add bulgarian-law --transport http https://mcp.ansvar.eu/law-bg/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": {
    "bulgarian-law": {
      "type": "url",
      "url": "https://mcp.ansvar.eu/law-bg/mcp"
    }
  }
}

GitHub Copilot -- add to VS Code settings.json:

{
  "github.copilot.chat.mcp.servers": {
    "bulgarian-law": {
      "type": "http",
      "url": "https://mcp.ansvar.eu/law-bg/mcp"
    }
  }
}

Use Locally (npm)

npx @ansvar/bulgarian-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": {
    "bulgarian-law": {
      "command": "npx",
      "args": ["-y", "@ansvar/bulgarian-law-mcp"]
    }
  }
}

Cursor / VS Code:

{
  "mcp.servers": {
    "bulgarian-law": {
      "command": "npx",
      "args": ["-y", "@ansvar/bulgarian-law-mcp"]
    }
  }
}

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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?"

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What's Included

Category	Count	Details
Statutes	1,997 statutes	Comprehensive Bulgarian legislation from parliament.bg
Provisions	17,103 sections	Full-text searchable with FTS5
EU Cross-References	Included	Directives and regulations linked to Bulgarian transpositions
Database Size	93 MB	Optimized SQLite, portable
Daily Updates	Automated	Freshness checks against Lex.bg / Държавен вестник

Verified data only -- every citation is validated against official sources (parliament.bg, Lex.bg). 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 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 Approach	This MCP Server
Search Lex.bg by statute name	Search by plain Bulgarian: "лични данни съгласие"
Navigate multi-chapter 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 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.

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Available Tools (13)

Core Legal Research Tools (8)

Tool	Description
search_legislation	FTS5 full-text search across 17,103 provisions with BM25 ranking
get_provision	Retrieve specific provision by statute + article/section reference
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 Bulgarian 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 Bulgarian statute
get_bulgarian_implementations	Find Bulgarian laws implementing a specific EU act
search_eu_implementations	Search EU documents with Bulgarian implementation counts
get_provision_eu_basis	Get EU law references for a specific provision
validate_eu_compliance	Check implementation status of Bulgarian statutes against EU directives

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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.

Metric	Value
EU Member State	Since 2007
Legal System	Civil law (continental European tradition)
Official Gazette	Държавен вестник (dv.parliament.bg)
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 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:

Source	Check	Method
Statute amendments	Lex.bg / parliament.bg comparison	All 1,997 statutes checked
New statutes	Държавен вестник 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 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.

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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/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

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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/bulgarian-law-mcp (This Project)

Query 1,997 Bulgarian statutes directly from Claude -- ЗЗЛД, НК, ГПК, ТЗ, and more. Full provision text with EU cross-references. npx @ansvar/bulgarian-law-mcp

@ansvar/romanian-law-mcp

Query Romanian statutes directly from Claude -- EU member, civil law tradition. npx @ansvar/romanian-law-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

@ansvar/sanctions-mcp

Offline-capable sanctions screening -- OFAC, EU, UN sanctions lists. pip install ansvar-sanctions-mcp

70+ national law MCPs covering Australia, Brazil, Canada, Denmark, Finland, France, Germany, Greece, Hungary, Ireland, Lithuania, Netherlands, Norway, Sweden, and more.

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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)

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Roadmap

• Core statute database with FTS5 search
• Full corpus ingestion (1,997 statutes, 17,103 provisions)
• EU law integration tools
• Vercel Streamable HTTP deployment
• npm package publication
• Daily freshness checks
• Case law expansion (ВКС, КС)
• Historical statute versions (amendment tracking)
• Secondary legislation expansion

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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}
}

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License

Apache License 2.0. See LICENSE for details.

Data Licenses

• Statutes & Legislation: Bulgarian National Assembly / Lex.bg (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. 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

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