Czech Law MCP Server

Czech Law MCP Server

The ASPI (Sbírka zákonů) alternative for the AI age.

Query 45,899 Czech statutes — from zákon č. 110/2019 Sb. (ochrana osobních údajů) and the Trestní zákoník to the Občanský zákoník, zákon o kybernetické bezpečnosti, and more — directly from Claude, Cursor, or any MCP-compatible client.

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

Built by Ansvar Systems -- Stockholm, Sweden

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Why This Exists

Czech legal research is scattered across e-Sbírka, zakonyprolidi.cz, ASPI, and EUR-Lex. Whether you're:

• A lawyer validating citations in a brief or smlouva
• A compliance officer checking obligations under zákon č. 110/2019 Sb. or zákon č. 181/2014 Sb.
• A legal tech developer building tools on Czech law
• A researcher tracing legislative history from důvodová zpráva to zákon

...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 Czech 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-cz/mcp

Claude Desktop — add to claude_desktop_config.json:

{
  "mcpServers": {
    "czech-law": {
      "type": "url",
      "url": "https://mcp.ansvar.eu/law-cz/mcp"
    }
  }
}

GitHub Copilot — add to VS Code settings.json:

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

Use Locally (npm)

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

Cursor / VS Code:

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

Example Queries

Once connected, just ask naturally (dotazy fungují v češtině nebo angličtině):

• "Co říká § 5 zákona č. 110/2019 Sb. o zpracování osobních údajů?"
• "Hledat 'ochrana osobních údajů' v české legislativě"
• "Je zákon č. 101/2000 Sb. o ochraně osobních údajů stále platný?"
• "Jaké jsou trestné činy v oblasti kybernetické kriminality v Trestním zákoníku (č. 40/2009 Sb.)?"
• "Které české zákony transponují směrnici NIS2?"
• "Hledat ustanovení o elektronickém podpisu v zákoně č. 297/2016 Sb."
• "Find provisions about data breach notification in Czech law"
• "Validate the citation 'zákon č. 110/2019 Sb., § 10'"

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What's Included

Verified data only — every citation is validated against official sources (e-Sbírka / zakonyprolidi.cz). Zero LLM-generated content.

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Why This Works

Verbatim Source Text (No LLM Processing):

• All statute text is ingested from e-Sbírka (e-sbirka.cz) 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 zákon number + paragraph
• Cross-references help navigate without loading everything at once

Technical Architecture:

e-Sbírka API → Parse → SQLite → FTS5 snippet() → MCP response
                 ↑                     ↑
          Provision parser       Verbatim database query

Traditional Research vs. This MCP

Traditional: Search e-Sbírka → Download PDF → Ctrl+F → Cross-reference with EUR-Lex → Check ÚOOÚ guidance → Repeat

This MCP: "Jaký je evropský základ § 10 zákona č. 110/2019 Sb. o ochraně osobních údajů?" → 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

Czech Republic is an EU member state (since 2004). Czech legislation in data protection, cybersecurity, financial services, and e-commerce is built on EU directives and regulations. The EU bridge tools give you full bi-directional lookup.

Key Czech EU Implementations

• Zákon č. 110/2019 Sb. — GDPR national implementation (zpracování osobních údajů)
• Zákon č. 181/2014 Sb. — Zákon o kybernetické bezpečnosti (NIS Directive transposition)
• Zákon č. 297/2016 Sb. — Zákon o službách vytvářejících důvěru (eIDAS transposition)
• Zákon č. 370/2017 Sb. — Platební styk (PSD2 transposition)

See EU_INTEGRATION_GUIDE.md for detailed documentation.

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Data Sources & Freshness

All content is sourced from authoritative Czech legal databases:

• e-Sbírka — Elektronická Sbírka zákonů a mezinárodních smluv (official electronic collection)
• zakonyprolidi.cz — Comprehensive Czech legal database
• EUR-Lex — Official EU law database (metadata only)

Data Provenance

Automated Freshness Checks (Daily)

A daily GitHub Actions workflow monitors e-Sbírka for changes:

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:

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 e-Sbírka publications. However:

• This is a research tool, not a substitute for professional legal counsel
• Court case coverage is not included in the free tier — do not rely solely on this for judikatura research
• Verify critical citations against primary sources (e-Sbírka, Sbírka zákonů) for court filings
• EU cross-references are extracted from statute text and EUR-Lex metadata, not a complete implementation mapping

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 Česká advokátní komora (Czech Bar Association) professional conduct standards.

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Development

Setup

git clone https://github.com/Ansvar-Systems/Czech-law-mcp
cd Czech-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 e-Sbírka
npm run ingest:all                # Full corpus ingestion (all laws, skip existing)
npm run ingest:opendata           # Ingest from open data sources
npm run build:db                  # Rebuild SQLite database
npm run drift:detect              # Run drift detection against anchors
npm run check-updates             # Check for amendments
npm run coverage:all-laws         # Check coverage against full e-Sbírka corpus

Performance

• Search Speed: <100ms for most FTS5 queries
• Database Size: ~1.2 GB (comprehensive — 45,899 statutes, 461,231 provisions)
• 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/czech-law-mcp (This Project)

Query 45,899 Czech statutes directly from Claude — zákon č. 110/2019 Sb., Trestní zákoník, Občanský zákoník, and more. Full provision text with EU cross-references. npx @ansvar/czech-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, Denmark, Estonia, Finland, France, Germany, Ireland, Italy, Luxembourg, 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 (Ústavní soud, Nejvyšší soud, Nejvyšší správní soud)
• EU cross-reference expansion
• Historical statute versions and amendment tracking
• ÚOOÚ and NBÚ guidance documents
• Důvodové zprávy (legislative preparatory works)

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Roadmap

• Core statute database with FTS5 search (45,899 statutes, 461,231 provisions)
• EU law integration with bi-directional lookup
• Premium agency guidance dataset (10,000 documents)
• Vercel Streamable HTTP deployment
• npm package publication
• Judikatura (court case law) expansion
• Důvodové zprávy (preparatory works) coverage
• Full EU text integration (via @ansvar/eu-regulations-mcp)
• Historical statute versions (amendment tracking)

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Citation

If you use this MCP server in academic research:

@software{czech_law_mcp_2026,
  author = {Ansvar Systems AB},
  title = {Czech Law MCP Server: AI-Powered Legal Research Tool},
  year = {2026},
  url = {https://github.com/Ansvar-Systems/Czech-law-mcp},
  note = {45,899 Czech statutes with 461,231 provisions and EU law cross-references}
}

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License

Apache License 2.0. See LICENSE for details.

Data Licenses

• Statutes & Legislation: Ministerstvo vnitra České republiky / e-Sbírka (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 is part of our Central European coverage — alongside Slovak, Polish, and Hungarian law MCPs — ensuring that the full EU compliance picture is accessible from a single AI interface.

So we're open-sourcing it. Navigating 45,899 statutes and 461,231 provisions shouldn't require a law degree.

ansvar.eu -- Stockholm, Sweden

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