MySQL Legacy MCP

Name: MySQL Legacy MCP
Author: Rufflet

by Ruffletversion 0.2.1i★ –iRuns on your computer

Registry nameio.github.Rufflet/mysql-legacy-mcp

Install

Overview

Description from the maker (original English)

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

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Databases & datasets
You need to fill in: MYSQL_LEGACY_HOST, MYSQL_LEGACY_USER, MYSQL_LEGACY_PASSWORD

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: MYSQL_LEGACY_HOST, MYSQL_LEGACY_USER, MYSQL_LEGACY_PASSWORD, MYSQL_LEGACY_PORT, MYSQL_LEGACY_DATABASE, MYSQL_LEGACY_HIDE_SYSTEM_DATABASES, MYSQL_LEGACY_QUERY_TIMEOUT, MYSQL_LEGACY_MAX_ROWS, MYSQL_LEGACY_MAX_RESULT_BYTES, MYSQL_LEGACY_CONNECT_TIMEOUT, MYSQL_LEGACY_POOL_SIZE, MYSQL_LEGACY_ALLOW_INSERT, MYSQL_LEGACY_ALLOW_UPDATE, MYSQL_LEGACY_ALLOW_DELETE, MYSQL_LEGACY_ALLOW_DDL, MYSQL_LEGACY_DISABLE_READ_ONLY_TRANSACTIONS

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "mysql-legacy": {
      "command": "npx",
      "args": [
        "-y",
        "mysql-legacy-mcp"
      ],
      "env": {
        "MYSQL_LEGACY_HOST": "your-value",
        "MYSQL_LEGACY_USER": "your-value",
        "MYSQL_LEGACY_PASSWORD": "your-value",
        "MYSQL_LEGACY_PORT": "your-value",
        "MYSQL_LEGACY_DATABASE": "your-value",
        "MYSQL_LEGACY_HIDE_SYSTEM_DATABASES": "your-value",
        "MYSQL_LEGACY_QUERY_TIMEOUT": "your-value",
        "MYSQL_LEGACY_MAX_ROWS": "your-value",
        "MYSQL_LEGACY_MAX_RESULT_BYTES": "your-value",
        "MYSQL_LEGACY_CONNECT_TIMEOUT": "your-value",
        "MYSQL_LEGACY_POOL_SIZE": "your-value",
        "MYSQL_LEGACY_ALLOW_INSERT": "your-value",
        "MYSQL_LEGACY_ALLOW_UPDATE": "your-value",
        "MYSQL_LEGACY_ALLOW_DELETE": "your-value",
        "MYSQL_LEGACY_ALLOW_DDL": "your-value",
        "MYSQL_LEGACY_DISABLE_READ_ONLY_TRANSACTIONS": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add mysql-legacy --env MYSQL_LEGACY_HOST=your-value --env MYSQL_LEGACY_USER=your-value --env MYSQL_LEGACY_PASSWORD=your-value --env MYSQL_LEGACY_PORT=your-value --env MYSQL_LEGACY_DATABASE=your-value --env MYSQL_LEGACY_HIDE_SYSTEM_DATABASES=your-value --env MYSQL_LEGACY_QUERY_TIMEOUT=your-value --env MYSQL_LEGACY_MAX_ROWS=your-value --env MYSQL_LEGACY_MAX_RESULT_BYTES=your-value --env MYSQL_LEGACY_CONNECT_TIMEOUT=your-value --env MYSQL_LEGACY_POOL_SIZE=your-value --env MYSQL_LEGACY_ALLOW_INSERT=your-value --env MYSQL_LEGACY_ALLOW_UPDATE=your-value --env MYSQL_LEGACY_ALLOW_DELETE=your-value --env MYSQL_LEGACY_ALLOW_DDL=your-value --env MYSQL_LEGACY_DISABLE_READ_ONLY_TRANSACTIONS=your-value -- npx -y mysql-legacy-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "mysql-legacy": {
      "command": "npx",
      "args": [
        "-y",
        "mysql-legacy-mcp"
      ],
      "env": {
        "MYSQL_LEGACY_HOST": "your-value",
        "MYSQL_LEGACY_USER": "your-value",
        "MYSQL_LEGACY_PASSWORD": "your-value",
        "MYSQL_LEGACY_PORT": "your-value",
        "MYSQL_LEGACY_DATABASE": "your-value",
        "MYSQL_LEGACY_HIDE_SYSTEM_DATABASES": "your-value",
        "MYSQL_LEGACY_QUERY_TIMEOUT": "your-value",
        "MYSQL_LEGACY_MAX_ROWS": "your-value",
        "MYSQL_LEGACY_MAX_RESULT_BYTES": "your-value",
        "MYSQL_LEGACY_CONNECT_TIMEOUT": "your-value",
        "MYSQL_LEGACY_POOL_SIZE": "your-value",
        "MYSQL_LEGACY_ALLOW_INSERT": "your-value",
        "MYSQL_LEGACY_ALLOW_UPDATE": "your-value",
        "MYSQL_LEGACY_ALLOW_DELETE": "your-value",
        "MYSQL_LEGACY_ALLOW_DDL": "your-value",
        "MYSQL_LEGACY_DISABLE_READ_ONLY_TRANSACTIONS": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "mysql-legacy": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "mysql-legacy-mcp"
      ],
      "env": {
        "MYSQL_LEGACY_HOST": "your-value",
        "MYSQL_LEGACY_USER": "your-value",
        "MYSQL_LEGACY_PASSWORD": "your-value",
        "MYSQL_LEGACY_PORT": "your-value",
        "MYSQL_LEGACY_DATABASE": "your-value",
        "MYSQL_LEGACY_HIDE_SYSTEM_DATABASES": "your-value",
        "MYSQL_LEGACY_QUERY_TIMEOUT": "your-value",
        "MYSQL_LEGACY_MAX_ROWS": "your-value",
        "MYSQL_LEGACY_MAX_RESULT_BYTES": "your-value",
        "MYSQL_LEGACY_CONNECT_TIMEOUT": "your-value",
        "MYSQL_LEGACY_POOL_SIZE": "your-value",
        "MYSQL_LEGACY_ALLOW_INSERT": "your-value",
        "MYSQL_LEGACY_ALLOW_UPDATE": "your-value",
        "MYSQL_LEGACY_ALLOW_DELETE": "your-value",
        "MYSQL_LEGACY_ALLOW_DDL": "your-value",
        "MYSQL_LEGACY_DISABLE_READ_ONLY_TRANSACTIONS": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

MYSQL_LEGACY_HOST required env
Database host or local tunnel endpoint
MYSQL_LEGACY_USER required env
Dedicated database reader account
MYSQL_LEGACY_PASSWORD secret required env
Nonempty database account password
MYSQL_LEGACY_PORT env
TCP port, 1–65535
MYSQL_LEGACY_DATABASE env
Optional default database
MYSQL_LEGACY_HIDE_SYSTEM_DATABASES env
Hide mysql and information_schema from listings
MYSQL_LEGACY_QUERY_TIMEOUT env
Driver query timeout, 100–60000 milliseconds
MYSQL_LEGACY_MAX_ROWS env
SELECT response row limit, 1–1000
MYSQL_LEGACY_MAX_RESULT_BYTES env
SELECT row-data JSON byte limit, 1024–1048576
MYSQL_LEGACY_CONNECT_TIMEOUT env
Connection-establishment timeout, 100–60000 milliseconds
MYSQL_LEGACY_POOL_SIZE env
Pooled connection limit, 1–50
MYSQL_LEGACY_ALLOW_INSERT env
Enable the mysql_legacy_insert tool
MYSQL_LEGACY_ALLOW_UPDATE env
Enable the mysql_legacy_update tool (WHERE clause always required)
MYSQL_LEGACY_ALLOW_DELETE env
Enable the mysql_legacy_delete tool (WHERE clause always required)
MYSQL_LEGACY_ALLOW_DDL env
Enable the mysql_legacy_ddl tool (table-level statements only)
MYSQL_LEGACY_DISABLE_READ_ONLY_TRANSACTIONS env
Disable the read-only transaction wrap around mysql_legacy_select on MySQL 5.6.5+

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account Rufflet, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Databases & datasetsi

More stars than 0% of the other 1141 servers in this category
Published to the registry more recently than 37% of the other 1141 servers in this category
Basic checks equal to or better than 100% of the other 1141 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is MySQL Legacy MCP safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: MYSQL_LEGACY_HOST, MYSQL_LEGACY_USER, MYSQL_LEGACY_PASSWORD

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.2.1) reached the registry 2 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Supabase, MongoDB MCP Server, Elasticsearch MCP Server

Alternatives

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README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

MySQL Legacy MCP

MCP server for legacy MySQL 5.0–5.6 databases through stdio. The package is on npm as mysql-legacy-mcp and in the official MCP Registry as io.github.Rufflet/mysql-legacy-mcp.

It uses MySQL 5.1-compatible SQL and SHOW metadata queries. Live MCP tests cover MySQL 5.0.51a, 5.1.73, 5.5.62, and 5.6.51. It is deliberately small: read-only by default, with INSERT/UPDATE/DELETE/DDL as opt-in tools disabled unless explicitly enabled; no TLS configuration, and no custom authentication or charset options.

Is this for you?

You need an AI agent to inspect a MySQL 5.0, 5.1, 5.5, or 5.6 database.
Your current MySQL MCP server assumes MySQL 5.7+, JSON functions, or newer information_schema fields.
You need schema inspection and SELECT queries, with write operations off by default and opt-in per statement type.

If you are seeing ER_NOT_SUPPORTED_AUTH_MODE, HANDSHAKE_INSECURE_AUTH, Old password authentication is not supported, legacy TLS errors, or garbled cp1251 / latin1 text, read Troubleshooting first. Those symptoms are not all solved by this package.

Requirements

Node.js 18.14.1 or later
npm
A dedicated MySQL account with only the required read and metadata privileges

Where it is listed

Installation is always local stdio via npm (npx -y mysql-legacy-mcp). Directory pages do not make that faster; they are discovery indexes. The official MCP Registry is the machine-readable source (io.github.Rufflet/mysql-legacy-mcp) that aggregators ingest, including env-var metadata from server.json. Clients that speak that registry can pre-fill configuration from it.

Maintainer submission status for other directories is in docs/RELEASE_CHECKLIST.md.

Quick install

Claude Code

claude mcp add --transport stdio mysql-legacy \

--env MYSQL_LEGACY_HOST=127.0.0.1 \ --env MYSQL_LEGACY_USER=legacy_reader \ --env MYSQL_LEGACY_PASSWORD=replace-with-a-secret \ --env MYSQL_LEGACY_DATABASE=legacy_app \ -- npx -y mysql-legacy-mcp

Codex

codex mcp add mysql-legacy \

--env MYSQL_LEGACY_HOST=127.0.0.1 \ --env MYSQL_LEGACY_USER=legacy_reader \ --env MYSQL_LEGACY_PASSWORD=replace-with-a-secret \ --env MYSQL_LEGACY_DATABASE=legacy_app \ -- npx -y mysql-legacy-mcp

Cursor and other clients

"mcpServers": { "mysql-legacy": { "type": "stdio", "command": "npx", "args": ["-y", "mysql-legacy-mcp"], "env": { "MYSQL_LEGACY_HOST": "127.0.0.1", "MYSQL_LEGACY_USER": "legacy_reader", "MYSQL_LEGACY_PASSWORD": "replace-with-a-secret", "MYSQL_LEGACY_DATABASE": "legacy_app" } } } }

Use the schema required by your client. Full copy-paste instructions for Claude Desktop, Codex, VS Code, Windsurf, Gemini, Trae, Qoder, and more are in the Installation guide.

Compatibility

MySQL	Status
5.0	Verified: 5.0.51a
5.1	Verified: 5.1.73
5.5	Verified: 5.5.62
5.6	Verified: 5.6.51
5.7	Verified reference only: 5.7.44
8.0	Not a target; default `caching_sha2_password` is unsupported

Each tested target passed all 11 tools — the 7 read-only tools plus the 4 opt-in write tools, with MYSQL_LEGACY_ALLOW_* flags checked both left at their default false and explicitly enabled — through a real MCP stdio session. On MySQL 5.6.5 and later, this also exercised the actual START TRANSACTION READ ONLY path used by mysql_legacy_select; below that version it exercised the silent plain-query fallback. Exact sources, test conditions, and the MySQL 8.0 boundary are recorded in the compatibility audit. This does not cover pre-4.1 old_password, custom connection charsets, TLS, or your server's exact patch level.

Compared with modern MySQL MCP servers

Server	Stated MySQL baseline	Focus
`mysql-legacy-mcp`	Verified live: 5.0–5.6	Legacy schema inspection and SELECT by default; opt-in INSERT/UPDATE/DELETE/DDL, with UPDATE/DELETE always requiring a WHERE clause
`@benborla29/mcp-server-mysql`	5.7+; 8.0+ recommended	Modern MySQL features such as TLS, SSH tunnels, and optional writes

This is a compatibility distinction, not a benchmark: choose the modern server for its modern-database features.

Features

Read-only SELECT tool with parser checks and result-size limits, wrapped in a read-only transaction on MySQL 5.6.5+
SHOW-based database, table, column, CREATE TABLE, and index inspection
Opt-in INSERT/UPDATE/DELETE/DDL tools, each disabled by default and gated by its own MYSQL_LEGACY_ALLOW_* flag; UPDATE and DELETE always require a WHERE clause
A small pooled set of MySQL connections (MYSQL_LEGACY_POOL_SIZE); no reliance on CTEs, JSON functions, or modern metadata columns

Tools

Tool	Purpose
`mysql_legacy_ping`	Return `VERSION()`
`mysql_legacy_select`	Run one parsed SELECT statement
`mysql_legacy_insert`	Run one INSERT statement (opt-in, `MYSQL_LEGACY_ALLOW_INSERT`)
`mysql_legacy_update`	Run one UPDATE statement with a required WHERE clause (opt-in, `MYSQL_LEGACY_ALLOW_UPDATE`)
`mysql_legacy_delete`	Run one DELETE statement with a required WHERE clause (opt-in, `MYSQL_LEGACY_ALLOW_DELETE`)
`mysql_legacy_ddl`	Run one table-level CREATE/ALTER/DROP/TRUNCATE/RENAME statement (opt-in, `MYSQL_LEGACY_ALLOW_DDL`)
`mysql_legacy_list_databases`	List databases
`mysql_legacy_list_tables`	List tables and views
`mysql_legacy_describe_table`	Show columns
`mysql_legacy_show_create_table`	Show table DDL
`mysql_legacy_list_indexes`	Show indexes

Documentation

Installation guide — client-specific setup
Configuration — environment variables, privileges, and security limits
Troubleshooting — authentication, TLS, encoding, and startup errors
Compatibility audit — reproducible version evidence
Roadmap — deliberately deferred work and why

Why this exists

This project came from a QA/fullstack workflow that needed AI-assisted inspection of a production MySQL 5.1 database. It is a focused utility for exploring legacy schemas and preparing migrations.

Contributing

See CONTRIBUTING.md for how to propose changes, run checks locally, and what evidence a compatibility claim needs. Quick start:

npm ci

npm run check npm run smoke:static

For authorized database testing, see the smoke-test instructions in the compatibility audit.

License

MIT.

MySQL Legacy MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Databases & datasetsi

Common questions

Alternatives

Supabase

MongoDB MCP Server

Elasticsearch MCP Server

README from the maker

MySQL Legacy MCP

Is this for you?

Requirements

Where it is listed

Quick install

Claude Code

Codex

Cursor and other clients

Compatibility

Compared with modern MySQL MCP servers

Features

Tools

Documentation

Why this exists

Contributing

License