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Manifold Markets MCP Server

by bmorphism
npmGitHub
JavaScript
MIT License
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2
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Manifold Markets MCP Server

An MCP server for interacting with Manifold Markets prediction markets. This server provides comprehensive access to Manifold's features through a clean MCP interface, enabling sophisticated market interactions and collective intelligence mechanisms.

Architecture

The server implements a complete mapping of Manifold Markets' API capabilities through a structured tool system:

Core Components

  • Schema Layer: Zod-based validation schemas for all operations
  • API Integration: Direct mapping to Manifold's REST endpoints
  • Tool Handlers: Request processing with proper error management
  • Type Safety: Full TypeScript implementation

Tool Categories

Market Creation & Management
  • create_market: Create markets (BINARY, MULTIPLE_CHOICE, PSEUDO_NUMERIC, POLL)
  • unresolve_market: Revert resolved markets
  • close_market: Close markets for trading
  • add_answer: Add options to multiple choice markets
Market Interaction
  • follow_market: Track markets of interest
  • react: Like/dislike markets and comments
  • add_bounty: Add bounties for analysis
  • award_bounty: Reward valuable contributions
Trading Operations
  • place_bet: Execute market trades
  • cancel_bet: Cancel limit orders
  • sell_shares: Liquidate positions
Liquidity Management
  • add_liquidity: Provide market liquidity
  • remove_liquidity: Withdraw provided liquidity
Information Retrieval
  • search_markets: Find markets with filters
  • get_market: Detailed market information
  • get_user: User profile data
  • get_positions: Portfolio tracking
Social Features
  • send_mana: Transfer mana between users

Verified Capabilities

The server has been tested through comprehensive interaction trajectories:

Successfully Tested

  1. Market Discovery & Following
    • ✅ Market search with filters
    • ✅ Market following
    • ✅ Detailed market information retrieval
  2. Trading Operations
    • ✅ Liquidity provision
    • ✅ Bet placement with probability updates
    • ✅ Position liquidation
    • ✅ Share selling
  3. Permission Management
    • ✅ Role-based access control
    • ✅ Authentication handling
    • ✅ Error messaging

Permission-Restricted Operations

These operations are implemented but require specific user roles:

  • Market resolution/unresolving (market creator)
  • Market closing (market creator)
  • Bounty management (market creator)
  • Liquidity removal (liquidity provider)

Prerequisites

  • Node.js 18 or higher
  • npm or yarn
  • Manifold Markets API key
  • Minimum M$1000 balance for market creation

Installation

1. Install the package

npm install manifold-mcp-server

2. Get your API Key

  1. Log in to Manifold Markets
  2. Go to your profile settings
  3. Generate an API key
  4. Ensure account has sufficient mana for intended operations

3. Configure MCP Settings

For Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{ "mcpServers": { "manifold": { "command": "node", "args": ["/path/to/manifold-mcp-server/build/index.js"], "env": { "MANIFOLD_API_KEY": "your_api_key_here" } } } }
For Cline (VSCode Extension)

Add to ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json:

{ "mcpServers": { "manifold": { "command": "node", "args": ["/path/to/manifold-mcp-server/build/index.js"], "env": { "MANIFOLD_API_KEY": "your_api_key_here" } } } }

Tool Documentation

Market Creation & Management

create_market

Create a new prediction market:

{ outcomeType: 'BINARY' | 'MULTIPLE_CHOICE' | 'PSEUDO_NUMERIC' | 'POLL' | 'BOUNTIED_QUESTION' question: string description?: string | { type: 'doc' content: any[] } closeTime?: number // Unix timestamp ms visibility?: 'public' | 'unlisted' initialProb?: number // Required for BINARY (1-99) min?: number // Required for PSEUDO_NUMERIC max?: number // Required for PSEUDO_NUMERIC isLogScale?: boolean initialValue?: number // Required for PSEUDO_NUMERIC answers?: string[] // Required for MULTIPLE_CHOICE/POLL addAnswersMode?: 'DISABLED' | 'ONLY_CREATOR' | 'ANYONE' shouldAnswersSumToOne?: boolean totalBounty?: number // Required for BOUNTIED_QUESTION }
unresolve_market

Unresolve a previously resolved market:

{ contractId: string answerId?: string // For multiple choice markets }
close_market

Close a market for trading:

{ contractId: string closeTime?: number // Optional close time }

Market Interaction

follow_market

Follow or unfollow a market:

{ contractId: string follow: boolean }
react

React to markets or comments:

{ contentId: string contentType: 'comment' | 'contract' remove?: boolean reactionType: 'like' | 'dislike' }

Trading Operations

place_bet

Place a bet on a market:

{ marketId: string amount: number outcome: 'YES' | 'NO' limitProb?: number // 0.01-0.99 }
sell_shares

Sell shares in a market:

{ marketId: string outcome?: 'YES' | 'NO' shares?: number // Defaults to all }

Liquidity Management

add_liquidity

Add liquidity to market pool:

{ marketId: string amount: number }
remove_liquidity

Remove liquidity from market pool:

{ contractId: string amount: number }

Error Handling

The server implements comprehensive error handling:

  1. Input Validation
    • Parameter type checking via Zod schemas
    • Value range validation
    • Required field verification
  2. API Communication
    • Authentication errors
    • Network failures
    • Rate limiting
    • Permission checks
  3. Business Logic
    • Insufficient balance
    • Invalid market states
    • Unauthorized operations
  4. Error Response Format
{ code: ErrorCode message: string details?: any }

Development

# Clone the repository git clone https://github.com/bmorphism/manifold-mcp-server.git cd manifold-mcp-server # Install dependencies npm install # Build npm run build # Run tests npm test

Contributing

Contributions welcome! Areas of interest:

  • Advanced market analysis tools
  • Portfolio optimization features
  • Integration with other prediction platforms
  • Documentation improvements

Security

  • API keys handled via environment variables
  • Input validation on all parameters
  • Rate limiting protection
  • Safe error messages
  • Role-based access control

License

MIT

You must be authenticated.

A
security – no known vulnerabilities
A
license - permissive license
A
quality - confirmed to work

remote-capable server

The server can be hosted and run remotely because it primarily relies on remote services or has no dependency on the local environment.

Tools

View all tools

Provides comprehensive access to Manifold Markets prediction platform through a clean MCP interface, enabling users to create markets, place bets, manage liquidity, and utilize social features through natural language.

  1. Architecture
    1. Core Components
    2. Tool Categories
  2. Verified Capabilities
    1. Successfully Tested
    2. Permission-Restricted Operations
  3. Prerequisites
    1. Installation
      1. Install the package
      2. Get your API Key
      3. Configure MCP Settings
    2. Tool Documentation
      1. Market Creation & Management
      2. Market Interaction
      3. Trading Operations
      4. Liquidity Management
    3. Error Handling
      1. Development
        1. Contributing
          1. Security
            1. License

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