Walnut is a Model Context Protocol (MCP) server: Connect your portfolio to Claude, ChatGPT, or Codex to analyze it and make smarter investments. As an MCP server it plugs straight into AI assistants, exposing its functionality as tools the model can invoke on your behalf.
It's a hosted (remote) server — point your client at https://walnutinvest.com/api/connector/mcp and you're connected, with nothing to install locally. The current release is v1.0.0.
You'll find Walnut in the Communication category here on mcp.site; it connects to Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, Zed, and any other MCP client — see the install snippets below. If you maintain Walnut for walnutinvest.com, claim this listing to verify ownership, earn the Verified badge, and keep the details current.