Comprehensive EU Law MCP Server

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50 free queries/day · no card required · OAuth signup at ansvar.eu/gateway

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.

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 isthe pre-built database — TDM and standards-licensing constraints on theupstream sources mean we host the corpus on Ansvar infrastructure ratherthan redistribute it as a public artifact.

Build your own: run this repo's ingestion script (entry-point varies perrepo — typically scripts/ingest.sh, npm run ingest, or make ingest;check the repo root).

MCP server providing structured access to EU treaties, regulations, directives, and CJEU case law through the Model Context Protocol.

Covers the TEU, TFEU, Charter of Fundamental Rights, 30+ key regulations (GDPR, AI Act, DORA, DMA, DSA, MiCA, etc.), 20+ key directives (NIS 2, CSRD, PSD2, etc.), and landmark CJEU cases. All data sourced from EUR-Lex and CJEU public databases.

Quick Start

Remote (Streamable HTTP — no install)

Connect directly to the hosted instance:

Local (npx — runs on your machine)

Requires Node.js 18+.

Tools

14 tools for searching and retrieving EU legislation and case law.

Tool	Description
`search_eu_law`	Full-text search across all EU law articles (treaties, regulations, directives). Filter by act type or specific act.
`get_article`	Get a specific article by act short title and article number (e.g., act="GDPR", article="5").
`get_regulation`	Get EU regulation metadata with article count and key provisions overview.
`get_directive`	Get EU directive metadata with transposition status overview across member states.
`get_case_law`	Get a CJEU or General Court case by case number or ECLI identifier.
`search_case_law`	Search CJEU cases by keyword, subject matter, or cited act. Filter by court and importance.
`get_transposition_status`	Check directive transposition status for a specific member state or all member states.
`get_regulatory_technical_standard`	Get delegated or implementing acts adopted under a parent regulation (e.g., DORA RTS, GDPR SCCs).
`get_commission_proposal`	Reference pending legislative proposals with current procedural status.
`build_legal_stance`	Aggregate provisions and case law for a legal question, returning relevant articles and cases ranked by relevance.
`validate_citation`	Validate an EU law citation against the database (e.g., "Article 5(1) GDPR", "Art. 101 TFEU").
`list_sources`	List all available data sources with record counts by category.
`check_data_freshness`	Check when the database was last built and what it covers.
`about`	Server metadata, data coverage, disclaimer, and freshness information.

Data Coverage

Treaties

Treaty on European Union (TEU) — institutional framework, common foreign and security policy
Treaty on the Functioning of the European Union (TFEU) — internal market, competition, free movement
Charter of Fundamental Rights — rights, freedoms, and principles

Key Regulations

GDPR, AI Act, DORA, DMA, DSA, MiCA, Data Act, Data Governance Act, Cyber Resilience Act, EMIR, EU Taxonomy, SFDR, and more.

Key Directives

NIS 2, CSRD, PSD2, Whistleblower Directive, Trade Secrets Directive, Anti-Money Laundering Directives, and more.

Case Law

Landmark CJEU and General Court cases with case numbers, ECLI identifiers, headnotes, ruling summaries, and importance scores.

Transposition Tracking

Directive transposition status per member state, including national implementing measures and notification dates.

Data Sources

All data is compiled from publicly available official EU sources:

EUR-Lex — Official Journal of the EU, legislative texts, CELEX numbers
CJEU / InfoCuria — Court of Justice case law and opinions
European Council / Commission — legislative proposals and procedural status

Data is a point-in-time snapshot. Check check_data_freshness for the build date.

Examples

Search for GDPR data transfer rules

Tool: search_eu_law
Input: { "query": "personal data transfer third country", "act_type": "regulation" }

Get a specific GDPR article

Tool: get_article
Input: { "act": "GDPR", "article": "45" }

Check NIS 2 transposition in Germany

Tool: get_transposition_status
Input: { "directive": "NIS 2", "member_state": "DE" }

Validate a citation

Tool: validate_citation
Input: { "citation": "Article 101 TFEU" }

Build a legal stance

Tool: build_legal_stance
Input: { "query": "What are the conditions for lawful processing of personal data?" }

Development

# Install dependencies
npm install

# Build
npm run build

# Run locally (stdio)
npm start

# Run in development mode
npm run dev

# Build the database from seed data
npm run build:db

Testing with MCP Inspector

npx @anthropic/mcp-inspector node dist/index.js

Architecture

Database: Read-only SQLite with FTS5 full-text search indexes
Transport: Stdio (local) and Streamable HTTP (remote)
Runtime: Node.js 18+, TypeScript, @modelcontextprotocol/sdk
No external API calls at runtime — all data served from the local database

Disclaimer

This server provides reference information about EU legislation. It does not constitute legal advice. All legal information must be independently verified against official EUR-Lex publications before professional use. See DISCLAIMER.md.

Privacy

This MCP server collects no user data. No telemetry, no tracking, no analytics. See PRIVACY.md.

Security

For vulnerability reports, see SECURITY.md. Do not open public issues for security matters.

License

Apache License 2.0. See LICENSE.