# Culprit SQL Studio

> Find slow queries in SQL Server, PostgreSQL, MySQL and MariaDB and get the fix in one sentence.

Find slow queries in SQL Server, PostgreSQL, MySQL and MariaDB and get the fix in one sentence. Free, open-source desktop app, CLI and MCP server.

## Facts
- Website: https://culpritsql.com
- Pricing: free
- Categories: Open Source, Developer Tools
- LotsDirectory page: https://lots.directory/products/culprit-sql-studio
- Listing state: Unclaimed. We listed this product from its public website, and its owner has not claimed it yet.

## Detailed info

## What is Culprit SQL Studio?

Culprit SQL Studio is a free and open-source database performance tuning desktop app, CLI, and MCP server for SQL Server, PostgreSQL, MySQL, MariaDB, and SQLite.

## What Culprit SQL Studio does

The tool reads database catalog views and existing execution statistics to identify slow queries, missing indexes, execution plan regressions, blocking sessions, and deadlocks. It explains query bottlenecks in one sentence, ranks findings by database time consumed, provides production-safe fixes, and equips coding agents with 25 MCP tools.

## Who Culprit SQL Studio is for

Coding agents and experts tuning SQL performance across SQL Server, PostgreSQL, MySQL, MariaDB, and SQLite.

## How Culprit SQL Studio works

Users launch the native desktop application or run the CLI to connect to a target database, Culprit analyzes built-in statistics views without installing server agents, and displays ranked findings with suggested index or query fixes.

## Key features

- Diagnoses slow queries and execution plan regressions across SQL Server, PostgreSQL, MySQL, MariaDB, and SQLite.
- Explains performance bottlenecks in one sentence with ranked evidence and production-safe fixes.
- Equips coding agents in Claude Code, Codex, and Cursor with 25 MCP tools.
- Operates read-only by default using existing database statistics without installing server agents.
- Provides a 14 MB native app for macOS, Windows, and Linux plus a CLI binary for scripts, CI, and agents.
- Free and open source under the MIT license with no account, no cloud, and no telemetry.

## Facts from culpritsql.com, checked 17 October 2026

- Analyzes performance across SQL Server, PostgreSQL, MySQL, MariaDB, and SQLite.
- Provides 25 MCP tools for coding agents like Claude Code, Codex, and Cursor.
- Free and open source under the MIT license with zero data leaving the local machine.

Written from Culprit SQL Studio's own website ([Homepage](https://culpritsql.com/)). The maker can claim this listing to edit it.

## FAQ

### Which database management systems are supported by Culprit?
Culprit supports SQL Server, Azure SQL, PostgreSQL, Amazon RDS, MySQL, MariaDB, and SQLite.

### Does Culprit require installing software on the database server?
No. Culprit connects as a client and reads existing statistics views without installing server agents.

### Which AI coding agents can connect to Culprit via MCP?
It provides 25 tools through the Model Context Protocol for agents including Claude Code, Codex, and Cursor.

### Under what software license is Culprit SQL Studio released?
Culprit SQL Studio is open source software published under the MIT license.

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Source: https://lots.directory/products/culprit-sql-studio · Machine-readable context by LotsDirectory.