PostgreSQL MCP server (hardened)

This is a helper that lets your AI assistant look inside a PostgreSQL database and answer questions about the data, without being able to change anything. It is made for people who want the AI to read and report, not to write. If you have ever wanted to ask "how many orders came in last month?" without opening a database tool, this is for you.

What this MCP server does

You ask your AI a question about your data, like how many customers signed up last week. The AI turns that into a database query and sends it to this helper. The helper checks the query first to make sure it only reads, then runs it against your PostgreSQL database inside a read-only transaction with a time limit. If the query looks too expensive, it is refused before it runs. You get the answer back in the chat, as a table or a short summary.

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What you can do with it

• Ask questions about your data in plain English and get answers
• Look at table structures, columns, and relationships
• Run read-only queries with automatic timeouts and cost limits
• Hide sensitive columns from the AI so it never sees them
• Get an audit log of every query that was run
• Check that a query is safe before it ever reaches the database

Try asking your AI

• “How many orders were placed in the last 30 days?”
• “Show me the top 10 customers by total spend this year”
• “What columns does the employees table have?”
• “Which products have not been ordered at all?”

What it gives back to you

You get answers in the chat, usually as a small table or a short written summary. The server also returns schema information when you ask about table structures. Every query is logged, so you can see what was asked and when. If a query is refused, you get a clear reason instead of a database error.

Before you start

Who it's for

Anyone who works with a PostgreSQL database and wants to ask questions about the data without writing SQL or risking changes, especially analysts, support teams, and operations staff.