Kalshi Eye MCP server

An MCP server that lets AI assistants such as Claude and Cursor search the Kalshi Eye archive of prediction market data. It can find Kalshi, Polymarket and Limitless markets, show how a market's price moved, check what was recorded, and list the order book files you can download.

It needs a Kalshi Eye API key: create one at API keys (a free account works) and set it as KALSHIEYE_API_KEY.

Install

Claude Code:

claude mcp add kalshieye -e KALSHIEYE_API_KEY=clab_your_key -- uvx kalshieye-mcp

Claude Desktop, Cursor and other clients (claude_desktop_config.json, .cursor/mcp.json, ...):

{
  "mcpServers": {
    "kalshieye": {
      "command": "uvx",
      "args": ["kalshieye-mcp"],
      "env": { "KALSHIEYE_API_KEY": "clab_your_key" }
    }
  }
}

Without a key, or with a placeholder, every tool answers with how to get one. Listing files and download links cover the datasets your plan includes.

uvx comes with uv. With pip instead: pip install kalshieye-mcp, then use kalshieye-mcp as the command.

Tools

Things to ask:

• "Which bitcoin markets does Kalshi Eye record, and since when?"
• "What were the last few hours of the Bills vs Rams market on October 12 like?"
• "How much of the Fed decision series is in the order book files?"
• "Is the recorder running, and how complete was last week?"

Notes

• Kalshi is recorded since October 12, 2026; Polymarket, Limitless and Chainlink prices since October 15, 2026. Each UTC day is published the next morning.
• Prices are dollars between 0 and 1. A Kalshi YES ask is 1 minus the best NO bid. Times are UTC.
• Free data without any key: a one-day sample on Hugging Face and runnable examples. The Python client for downloading files is kalshieye.
• KALSHIEYE_BASE_URL points the server at another deployment (default https://kalshieye.com).

Kalshi Eye is independent and is not affiliated with Kalshi, Polymarket or Limitless. MIT licensed.