TAS/CAS Jurisprudence Server

Court of Arbitration for Sport (TAS/CAS) decision search and retrieval

Overview

This MCP server provides tools to search and retrieve arbitration decisions from the Court of Arbitration for Sport (CAS/TAS). It enables Claude to research sports law precedents, anti-doping cases, and commercial sports disputes.

Available Tools

cas_search

Search CAS/TAS arbitration decisions by keywords, sport, year range, or procedure type.

Parameters:

• query (required): Search query for case content, parties, or keywords
• sport (optional): Filter by sport (e.g., "Football", "Cycling", "Athletics")
• year_from (optional): Filter decisions from this year (1984-2026)
• year_to (optional): Filter decisions until this year (1984-2026)
• procedure_type (optional): Filter by type - "Appeal", "Ordinary", "Anti-Doping", "Advisory"
• page (optional): Page number (default: 1)
• page_size (optional): Results per page, max 25 (default: 10)

cas_get_award

Retrieve detailed information about a specific CAS/TAS award.

Parameters:

• case_number (optional): CAS case number (e.g., "CAS 2023/A/9876")
• url (optional): Direct URL to the award page
• include_full_text (optional): Include full PDF text (default: false)

cas_recent

Get the most recent CAS/TAS arbitration decisions.

Parameters:

• limit (optional): Maximum number of decisions (1-50, default: 10)

cas_by_sport

Browse CAS/TAS decisions by sport category.

Parameters:

• sport (required): Sport to browse (e.g., "Football", "Cycling")
• page (optional): Page number (default: 1)

Installation

# Navigate to server directory
cd mcp-servers/tas-jurisprudence

# Install dependencies
npm install

# Build TypeScript
npm run build

# Run locally
npm run dev

Deployment

Railway

This server is designed for Railway deployment with HTTP transport:

# From the tas-jurisprudence directory
railway up

Configuration:

• Set custom domain: tas.bettercallclaude.ch
• MCP endpoint: https://tas.bettercallclaude.ch/tas-jurisprudence/mcp

Client Configuration

Claude Desktop

For local stdio transport (not recommended for this server):

{
  "mcpServers": {
    "tas-jurisprudence": {
      "command": "node",
      "args": ["/path/to/mcp-servers/tas-jurisprudence/dist/index.js"]
    }
  }
}

Remote HTTP Transport

For Railway deployment:

{
  "mcpServers": {
    "tas-jurisprudence": {
      "url": "https://tas.bettercallclaude.ch/tas-jurisprudence/mcp",
      "transport": "http"
    }
  }
}

Technical Details

Architecture

• Transport: Streamable HTTP (Express.js)
• Scraping: Playwright for JavaScript-rendered content
• Caching: In-memory LRU cache with configurable TTL
• Rate Limiting: 10-second crawl delay (respects robots.txt)

Cache TTLs

• Search results: 10 minutes
• Award details: 30 minutes
• Recent decisions: 5 minutes
• Sport browse: 15 minutes

Data Sources

• Main database: jurisprudence.tas-cas.org (JavaScript-rendered)
• Recent decisions: tas-cas.org/en/jurisprudence/recent-decisions.html
• PDF files: tas-cas.org/files/decision/

Legal Notice

CAS awards are publicly accessible, but their content is subject to copyright. This server:

• Provides metadata and summaries by default
• Links to official PDF sources rather than redistributing content
• Respects robots.txt crawl-delay requirements
• Is intended for legitimate legal research purposes

For full award redistribution, CAS permission may be required.

Development

# Run tests
npm test

# Watch mode
npm run test:watch

# Clean build artifacts
npm run clean

Troubleshooting

No search results

• The CAS database requires JavaScript rendering
• Ensure Playwright/Chromium is properly installed
• Check rate limiter isn't blocking requests

Memory issues in production

• Single browser instance is reused
• Pages are closed after each operation
• Implement periodic browser restart for long-running instances

Rate limiting errors

• Default 10-second delay between requests
• Increase CRAWL_DELAY_MS if getting blocked
• Check CAS website status

License

MIT License - BetterCallClaude Project

Resources

• CAS/TAS Official Website
• CAS Jurisprudence Database
• MCP Specification