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MySQL Legacy MCP for Grok

io.github.rufflet/mysql-legacy-mcp

Inspect and query MySQL 5.0–5.6; opt-in INSERT/UPDATE/DELETE/DDL. Live-verified 5.0–8.0.

client:Grok transport:stdio runtime:npm

Install MySQL Legacy MCP 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": {
    "mysql-legacy-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "mysql-legacy-mcp"
      ],
      "env": {
        "MYSQL_LEGACY_HOST": "<MYSQL_LEGACY_HOST>",
        "MYSQL_LEGACY_USER": "<MYSQL_LEGACY_USER>",
        "MYSQL_LEGACY_PASSWORD": "<MYSQL_LEGACY_PASSWORD>",
        "MYSQL_LEGACY_PORT": "<MYSQL_LEGACY_PORT>",
        "MYSQL_LEGACY_DATABASE": "<MYSQL_LEGACY_DATABASE>",
        "MYSQL_LEGACY_HIDE_SYSTEM_DATABASES": "<MYSQL_LEGACY_HIDE_SYSTEM_DATABASES>",
        "MYSQL_LEGACY_QUERY_TIMEOUT": "<MYSQL_LEGACY_QUERY_TIMEOUT>",
        "MYSQL_LEGACY_MAX_ROWS": "<MYSQL_LEGACY_MAX_ROWS>",
        "MYSQL_LEGACY_MAX_RESULT_BYTES": "<MYSQL_LEGACY_MAX_RESULT_BYTES>",
        "MYSQL_LEGACY_CONNECT_TIMEOUT": "<MYSQL_LEGACY_CONNECT_TIMEOUT>",
        "MYSQL_LEGACY_POOL_SIZE": "<MYSQL_LEGACY_POOL_SIZE>",
        "MYSQL_LEGACY_ALLOW_INSERT": "<MYSQL_LEGACY_ALLOW_INSERT>",
        "MYSQL_LEGACY_ALLOW_UPDATE": "<MYSQL_LEGACY_ALLOW_UPDATE>",
        "MYSQL_LEGACY_ALLOW_DELETE": "<MYSQL_LEGACY_ALLOW_DELETE>",
        "MYSQL_LEGACY_ALLOW_DDL": "<MYSQL_LEGACY_ALLOW_DDL>",
        "MYSQL_LEGACY_DISABLE_READ_ONLY_TRANSACTIONS": "<MYSQL_LEGACY_DISABLE_READ_ONLY_TRANSACTIONS>"
      }
    }
  }
}

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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