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mcp/harbor

Windsurf nucleus nucleus_features

How to: Windsurf nucleus nucleus_features

client:Windsurf transport:streamable-http tool:nucleus_features

Add nucleus to Windsurf

  1. 01

    Open ~/.codeium/windsurf/mcp_config.json and merge this in. Keep any servers already there. 

{
  "mcpServers": {
    "nucleus": {
      "serverUrl": "https://relay.nucleusos.dev/mcp"
    }
  }
}
  1. 02

    Save the file and restart Windsurf.

  2. 03

    Ask for something nucleus_features does. Windsurf lists the server's tools on connect and calls nucleus_features itself — you do not invoke it by name.

  3. 04

    If nothing happens, check the server is running and that nucleus's identifier in your config matches the one above exactly.

Global only — Windsurf has no per-project MCP config. Refresh Cascade after saving. Windsurf docs

Set these first

nucleus will not start until these are set, so nucleus_features never becomes available.

  • NUCLEUS_BRAIN_PATH

Same tool, other clients

This list was read from the server itself, by connecting to it and calling tools/list on 24 September 2026. It is what the server actually exposes, not what its listing claims.

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. The registry stores tool names only; connect the server for its live schemas.

nucleus MCP server