Bellwether MCP Server: Install & Setup

Install Bellwether in Claude Code

Claude Code

claude mcp add --transport http bellwether https://api.bellwether.markets/mcp

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

{
  "mcpServers": {
    "bellwether": {
      "url": "https://api.bellwether.markets/mcp"
    }
  }
}

Frequently asked questions

What does the Bellwether MCP server do?

Live Kalshi + Polymarket prediction-market data and cross-venue arbitrage spreads, one schema.

Is the Bellwether 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 Bellwether run locally or remotely?

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

How do I add Bellwether to Claude Code?

Run: claude mcp add --transport http bellwether https://api.bellwether.markets/mcp

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