Spoiler MCP Server: Install & Setup

Install Spoiler in Claude Code

Claude Code

claude mcp add --transport http spoiler https://spoiler.bet/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "spoiler": {
      "url": "https://spoiler.bet/mcp"
    }
  }
}

Frequently asked questions

What does the Spoiler MCP server do?

Sealed prediction-market verdicts, graded in public across Polymarket and Kalshi. No auth required.

Is the Spoiler MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does Spoiler run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add Spoiler to Claude Code?

Run: claude mcp add --transport http spoiler https://spoiler.bet/mcp

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