Yahoo Finance MCP Server

A remote MCP (Model Context Protocol) server for Yahoo Finance data, deployed on Cloudflare Workers.

Features

• 9 tools for accessing Yahoo Finance data

• Cookie + Crumb authentication for reliable API access

• SSE and Streamable HTTP transport support

• Cloudflare Workers deployment with Durable Objects

Tools

Setup

npm install

Development

npm run dev

Server runs at http://localhost:5173

Deploy

npm run deploy

Endpoints

Usage

Claude Desktop

Add to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json):

{
  "mcpServers": {
    "yahoo-finance": {
      "command": "npx",
      "args": ["mcp-remote", "https://your-worker.workers.dev/sse"]
    }
  }
}

MCP Inspector

npx @modelcontextprotocol/inspector@latest

Connect to http://localhost:5173/sse (local) or https://your-worker.workers.dev/sse (deployed).

Project Structure

src/
├── server.ts           # Worker entry point
├── mcp.ts              # MCP server with tool definitions
└── yahoo-finance-api.ts # Yahoo Finance API client

License

MIT