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

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.

Quick Start

Use Remotely (No Install Needed)

Connect directly to the hosted version — zero dependencies, nothing to install.

Endpoint: https://czech-law-mcp.vercel.app/mcp

Claude Desktop — add to claude_desktop_config.json:

{
  "mcpServers": {
    "czech-law": {
      "type": "url",
      "url": "https://czech-law-mcp.vercel.app/mcp"
    }
  }
}

GitHub Copilot — add to VS Code settings.json:

{
  "github.copilot.chat.mcp.servers": {
    "czech-law": {
      "type": "http",
      "url": "https://czech-law-mcp.vercel.app/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'"

What's Included

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

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.

Available Tools (13)

Core Legal Research Tools (8)

EU Law Integration Tools (5)

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.

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.

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 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.

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

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.

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)

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)

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}
}

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)

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