MySQL Legacy MCP server

This is a small helper that connects your AI assistant to an old MySQL database, the kind still running on version 5.0, 5.1, 5.5 or 5.6. It is handy if you work with a legacy system and want to ask questions about the tables and data in plain English instead of writing SQL yourself. By default it only reads; anything that changes data has to be switched on deliberately.

What this MCP server does

You ask your AI something like which tables exist in the database, or how many orders were placed last month. The AI passes that request to this helper program. The helper talks to your MySQL server using old-style SQL that works on versions 5.0 through 5.6, runs the query, and sends the result back. Your AI then shows you the answer in the chat as a table or a short summary. If you have turned on the write tools, it can also make changes for you, but only when you ask.

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What you can do with it

• List all databases on the server
• List the tables and views in a database
• Show the columns of a table and what type each one is
• Show the CREATE TABLE statement for a table
• List the indexes on a table
• Run a SELECT query and get the rows back
• Check which MySQL version the server is running

Try asking your AI

• “What tables are in the legacy_app database?”
• “Show me the columns of the customers table and what type each one is”
• “How many orders were placed in March 2019?”
• “What indexes exist on the orders table?”

What it gives back to you

You get answers in the chat, usually as a small table of rows or a short summary. For schema questions it shows lists of names, column details, or the CREATE TABLE text. For SELECT queries it shows the rows that matched, up to a size limit. If you use a write tool, it tells you whether the change went through.

Before you start

Who it's for

People who maintain or migrate old MySQL 5.0 to 5.6 systems, such as QA engineers, support staff and developers working with legacy databases.