What is mysql-mcp-webui CLAUDE.md?

A set of project instructions for a TypeScript application that provides an MCP server for MySQL and a React web interface for managing database connections. MySQL is a relational database, and React is a library for building web interfaces.

Use it when building the client or server, running both development servers, starting the application in HTTP or standard input/output mode, or working with its database tools and connection-management interface.

It tells the agent how this two-part project is structured and which commands build, run, and develop each part.

How yashagldit/mysql-mcp-webui configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to yashagldit/mysql-mcp-webui. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/yashagldit/mysql-mcp-webui/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/yashagldit/mysql-mcp-webui

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/yashagldit/mysql-mcp-webui/claude-md/github.svg)](https://agentmods.dev/instructions/yashagldit/mysql-mcp-webui/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/yashagldit/mysql-mcp-webui/claude-md"><img src="https://agentmods.dev/badge/instructions/yashagldit/mysql-mcp-webui/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/yashagldit/mysql-mcp-webui/claude-md"><img src="https://agentmods.dev/badge/instructions/yashagldit/mysql-mcp-webui/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 4,354 This file is loaded in full into every session.

When invoked 4,354 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.04354	$0.04354
Opus 5	$0.02177	$0.02177
Sonnet 5	$0.00871	$0.00871
Haiku 4.5	$0.00435	$0.00435

Measured 8d ago against content hash c7453ce3df80, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

mysql-mcp-webui CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

CLAUDE.md · 397 lines

How it starts

The opening of the file, as written. The whole thing — 397 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project Overview

MySQL MCP WebUI is a dual-purpose system that implements the Model Context Protocol (MCP) to enable Claude AI to interact with MySQL databases while providing a React-based web UI for configuration management. The project has two distinct but interconnected functionalities:

MCP Server: Exposes four tools (mysql_query, list_databases, switch_database, add_connection) for Claude to interact with MySQL, with optional TOON format for token-efficient responses
Web UI: React application for managing connections, databases, permissions, and API keys

Commands

Building

# Build both client and server (client builds first, then server)
npm run build

# Build server only
npm run build:server

# Build client only
npm run build:client

Development

# Run both server and client in development mode
npm run dev

# Run server only (with hot reload)
npm run dev:server

# Run client only (Vite dev server)
npm run dev:client

Running

# Start in HTTP mode (default, port 9274)
npm run start:http

# Start in stdio mode (for Claude Desktop direct integration)
npm run start:stdio

# Custom configurations
TRANSPORT=http HTTP_PORT=3001 node server/dist/index.js
NODE_ENV=production TRANSPORT=http HTTP_PORT=3003 node server/dist/index.js

Architecture

Workspace Structure

This is a monorepo with npm workspaces:

/server - Node.js/TypeScript backend
/client - React/TypeScript frontend
/data - SQLite database for configuration storage

Critical Architecture Patterns

1. Singleton Database Managers

All data access flows through singleton instances:

getDatabaseManager() - SQLite config database access (replaced ConfigManager in v2.0)
getConnectionManager() - MySQL connection pooling with lazy initialization and in-memory active state
getSessionManager() - HTTP session tracking for multi-instance support (v3.0)

Read the full file on GitHub · 397 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

8d ago First seen · 397 lines · 4,354 tokens per session scan A c7453ce3df80

Subscribe to this mod's changes

mysql-mcp-webui CLAUDE.md is an instructions file published in the GitHub repository yashagldit/mysql-mcp-webui (1 stars, last pushed 3mo ago), licensed MIT. It adds 4,354 tokens to every session, about $0.0218 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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mysql-mcp-webui: Instructions file for Claude Code