@robotixai/lexius-mcp

MCP server for the Lexius AI compliance platform. Connect Claude Desktop, Claude Code, or any MCP client to a provenance-tracked regulatory compliance database covering 10 EU regulations (GDPR, EU AI Act, DORA, DSA, DMA, Data Act, DGA, CRA, MiCA, eIDAS 2.0).

Quick Start

# Proxy mode — connect to a hosted Lexius API (no database required)
LEXIUS_API_URL=https://your-lexius-instance.example.com LEXIUS_API_KEY=lx_... npx @robotixai/lexius-mcp

# Direct mode — connect to your own Postgres
DATABASE_URL=postgresql://$POSTGRES_USER:$POSTGRES_PASSWORD@localhost:5432/$POSTGRES_DB npx @robotixai/lexius-mcp

Claude Desktop Configuration

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "lexius": {
      "command": "npx",
      "args": ["@robotixai/lexius-mcp"],
      "env": {
        "LEXIUS_API_URL": "https://your-lexius-instance.example.com",
        "LEXIUS_API_KEY": "lx_your_key_here"
      }
    }
  }
}

Available Tools

| Tool | Description | |------|-------------| | legalai_classify_system | Classify an AI system under a legislation's risk framework | | legalai_get_obligations | Get compliance obligations by role, risk level, legislation | | legalai_calculate_penalty | Calculate penalty exposure for a violation type | | legalai_get_article | Retrieve verbatim article text (AUTHORITATIVE from EUR-Lex) | | legalai_get_deadlines | List compliance deadlines | | legalai_search_knowledge | Semantic search across articles, obligations, FAQ | | legalai_answer_question | Answer compliance questions using the FAQ knowledge base | | legalai_run_assessment | Run structured compliance assessments | | legalai_list_legislations | List available legislations | | legalai_get_article_history | View article revision history | | legalai_get_derivation_chain | Trace an obligation back to its source articles | | legalai_get_article_extracts | View deterministically-extracted facts (fines, dates, cross-refs) | | legalai_run_swarm_assessment | Run a parallel hivemind assessment across all articles |

Provenance

Every response includes a provenance tier:

• AUTHORITATIVE — verbatim from official regulation text (EUR-Lex CELLAR)
• CURATED — written or reviewed by a domain expert
• AI_GENERATED — model output, flagged for review

Modes

Proxy Mode

Set LEXIUS_API_URL and LEXIUS_API_KEY. The MCP server translates tool calls into HTTP requests to the hosted API. No database required.

Direct Mode

Set DATABASE_URL. The MCP server connects directly to a Postgres database with the Lexius schema.

The easiest way to get a ready-made database is with our Docker image — schema and all 5 migrations are applied automatically on first start:

docker run -d -p 5432:5432 \
  -e POSTGRES_PASSWORD=$POSTGRES_PASSWORD \
  -e POSTGRES_DB=$POSTGRES_DB \
  -e POSTGRES_USER=$POSTGRES_USER \
  robotixai/lexius-db

Then point the MCP server at it:

DATABASE_URL=postgresql://$POSTGRES_USER:$POSTGRES_PASSWORD@localhost:5432/$POSTGRES_DB npx @robotixai/lexius-mcp

See the main repo for seeding data and fetching verbatim regulation text.

If both are set, direct mode takes precedence.

Legislations Supported

• EU AI Act (Regulation 2024/1689) — 113 articles + 13 annexes
• DORA (Regulation 2022/2554) — 64 articles

Links

• GitHub Repository
• CLI Package
• Report Issues

License

MIT