mcp-eu-sparql

Installation (one command)

Published on npm + the MCP Registry (io.github.matematicsolutions/mcp-eu-sparql). Run without cloning:

npx -y @matematicsolutions/mcp-eu-sparql

MCP client configuration (stdio):

{ "mcpServers": { "mcp-eu-sparql": { "command": "npx", "args": ["-y", "@matematicsolutions/mcp-eu-sparql"] } } }

(Building from source - below.)

MCP server for EU law and CJEU case law via the Publications Office SPARQL endpoint (Cellar / EUR-Lex), plus national data-protection authority decisions via GDPRhub.

CJEU corpus in Cellar (SPARQL COUNT, 2026-07-08): 34,261 judgments (JUDG), 8,362 orders (ORDER), 14,480 Advocate-General opinions (OPIN_AG) - 57,103 judgments and opinions in total, each with CELEX + ECLI.

Related MCP server: cellar-wrapper

Tools

• search_by_celex(celex, lang?) - act or judgment by CELEX number (e.g. 32016R0679 = GDPR, 62018CJ0311 = Schrems II).

• search_by_date_range(date_from, date_to, document_type?, lang?, limit?)

  • acts within a date range, optionally narrowed to a type (REG / DIR / DEC / RECO / OPIN).

• search_cjeu(query?, date_from?, date_to?, document_type?, lang?, limit?) - judgments (JUDG), orders (ORDER) and Advocate-General opinions (OPIN_AG) of the Court of Justice of the EU; optional keyword in the title (parties to the case, case number, keywords of the judgment).

• search_cjeu_by_ecli(ecli, lang?) - CJEU judgment by ECLI identifier (e.g. ECLI:EU:C:2020:559 = Schrems II).

• search_gdprhub(query, limit?) - full-text search in GDPRhub (the noyb project wiki): decisions of national data-protection authorities across the EU + commentary on GDPR articles. Content license: CC BY-NC-SA 4.0 - flagged in the license field of every citation.

Every response includes structuredContent.citations with the fields title, url, celex?, ecli?, publication_date?, document_type?, snippet?, license? - Patron reads this field and renders it in the UI panel as the "EU legal acts (EUR-Lex / CJEU)" section.

Stack

• Node 18+

• @modelcontextprotocol/sdk

• Stdio transport (like mcp-saos)

• Backend: HTTP POST to https://publications.europa.eu/webapi/rdf/sparql with format=application/sparql-results+json; GET to https://gdprhub.eu/api.php (MediaWiki API)

Build + run

npm install
npm run build
node dist/index.js   # starts the server on stdio

Wiring into Patron

In patron/backend/mcp-servers.json:

[
  {
    "name": "saos",
    "transport": "stdio",
    "command": "node",
    "args": ["C:/Users/<YOUR-USER>/mcp-saos/dist/index.js"]
  },
  {
    "name": "eu-sparql",
    "transport": "stdio",
    "command": "node",
    "args": ["C:/Users/<YOUR-USER>/mcp-eu-sparql/dist/index.js"]
  }
]

Tests

npm run drift          # offline: INSTRUCTIONS consistent with TOOLS and ErrorCode
npm run test:offline   # offline: query builders + parsers on fixtures (no network)
npm run smoke          # live: all 5 tools against Cellar + GDPRhub

License

MIT.

Part of the MateMatic legal stack

This server is one of five MCP connectors covering Polish jurisdiction + EU law, used by Patron (AGPL-3.0) and any other MCP-aware legal AI agent.

• mcp-eu-sparql (this repo) - EU law + CJEU (EUR-Lex / Cellar)

• mcp-saos - common courts, SN, TK, KIO

• mcp-nsa - NSA + 16 WSA administrative courts

• mcp-isap - Polish legislation (Dz.U. + M.P.)

• mcp-krs - Polish company registry (KRS)

All five MCP servers share the same structuredContent.citations contract: each tool returns an array of {title, url, snippet?, ...metadata} that legal agents can render directly in their citation panel.

See matematicsolutions/.github for the full org profile.