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mcp/harbor
Claude Desktop

Grain for Claude Desktop

io.github.pattrnlabs/grain

Run SQL queries and inspect database schemas through safe, visible MCP tools.

client:Claude Desktop transport:stdio runtime:npm

Install Grain in Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json · windows: %APPDATA%\Claude\claude_desktop_config.json

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

{
  "mcpServers": {
    "grain": {
      "command": "npx",
      "args": [
        "-y",
        "grain-tools"
      ],
      "env": {
        "GRAIN_CONNECTIONS": "<GRAIN_CONNECTIONS>",
        "GRAIN_MCP_SAFE_MODE": "<GRAIN_MCP_SAFE_MODE>",
        "GRAIN_MAX_ROWS": "<GRAIN_MAX_ROWS>"
      }
    }
  }
}

Settings → Developer → Edit Config opens this file. Restart the app after saving. Claude Desktop docs

Grain in other clients

Grain MCP server