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mcp/harbor
Grok

essentials for Grok

io.github.fieldcure/essentials

Essential MCP server: HTTP, web search, downloads, Wolfram|Alpha, shell, JS, file I/O, memory.

client:Grok transport:stdio runtime:nuget

Install essentials in Grok

.mcp.json (in your project root)

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "essentials": {
      "type": "stdio",
      "command": "dnx",
      "args": [
        "FieldCure.Mcp.Essentials",
        "--yes"
      ],
      "env": {
        "ESSENTIALS_SEARCH_ENGINE": "<ESSENTIALS_SEARCH_ENGINE>",
        "ESSENTIALS_SEARCH_API_KEY": "<ESSENTIALS_SEARCH_API_KEY>",
        "SERPER_API_KEY": "<SERPER_API_KEY>",
        "SERPAPI_API_KEY": "<SERPAPI_API_KEY>",
        "TAVILY_API_KEY": "<TAVILY_API_KEY>",
        "WOLFRAM_APPID": "<WOLFRAM_APPID>",
        "ESSENTIALS_MEMORY_PATH": "<ESSENTIALS_MEMORY_PATH>",
        "ESSENTIALS_DOWNLOAD_DIRECTORY": "<ESSENTIALS_DOWNLOAD_DIRECTORY>",
        "ESSENTIALS_SETTINGS_PATH": "<ESSENTIALS_SETTINGS_PATH>"
      }
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

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essentials MCP server