sam-maryland/sleeper-mcp-server

Sleeper MCP Server

A Model Context Protocol server that connects AI agents to Sleeper Fantasy Football, enabling intelligent league analysis, roster evaluation, and strategic insights.

What This Does

This MCP server allows you to ask AI agents natural language questions about your Sleeper fantasy football leagues:

• "Show me the standings for my league" - Get current standings with custom tiebreaker support
• "Who are the users in my league?" - View all league members
• "What were the matchups for week 5?" - See weekly scoring and results
• "Calculate standings using head-to-head tiebreakers" - Apply custom standings rules

Quick Start

1. Install and configure - See
2. Configure your league settings - Edit configs/league_settings.json with your league's custom rules
3. Start asking questions - Use natural language to analyze your league

Documentation

• - Start here
• - For contributors

Key Features

• Flexible Standings: Supports custom tiebreaker rules not available in Sleeper
• Natural Language: Ask questions conversationally - no need to learn APIs
• Agent Agnostic: Works with Claude, ChatGPT, or any MCP-compatible AI agent
• Head-to-Head Calculation: Automatically calculates complex tiebreakers from matchup data
• Multiple Leagues: Handle different leagues with different rule sets

Setting Up Your League

1. Configure Your League Settings

Edit configs/league_settings.json to add your league's information. Copy the template and replace with your details:

{
  "leagues": {
    "1234567890123456789": {
      "name": "My Fantasy League",
      "description": "League with custom head-to-head tiebreakers",
      "custom_standings": {
        "enabled": true,
        "instructions": "When teams have the same wins, use head-to-head record first, then points for, then points against",
        "tiebreak_order": ["wins", "head_to_head", "points_for", "points_against"],
        "notes": "This league uses custom tiebreakers not supported by Sleeper natively"
      }
    }
  }
}

2. Example Conversations

Once configured, you can ask your AI agent:

• "What are the current standings in my league?"
• "Show me the standings with our custom head-to-head tiebreakers"
• "Who beat who this week in my league?"
• "Compare the playoff seeding using our league rules"

For Developers

See for:

• Development workflow and testing
• Contributing guidelines
• Adding new features
• Building and deployment

How It Works

1. You ask your AI agent about your league in natural language
2. The agent uses this MCP server to fetch data from Sleeper's API
3. Custom calculations are applied based on your configs/league_settings.json
4. You get intelligent analysis tailored to your league's rules

The server automatically applies your league's custom settings, so you don't need to explain the rules every time.

License

MIT License - see LICENSE file