Lexiguard HR
Provides tools for querying a local MySQL database (read-only SQL, schema listing) and retrieving table structure, enabling natural language database interactions.
Click on "Install Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type
@followed by the MCP server name and your instructions, e.g., "@Lexiguard HRWho works in Engineering?"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
Lexiguard HR — Local MySQL MCP Server for Cursor
A small Model Context Protocol (MCP) demo that lets Cursor query a local MySQL HR database in natural language—without pasting credentials or schema into every chat.
Cursor (AI) ←── MCP (stdio) ──→ server.py ←── SQL ──→ MySQL (lexiguard)What it does
MCP tool | Description |
| Lists tables, columns, types, and keys so the AI knows what exists |
| Runs read-only SQL ( |
Example questions in Cursor chat:
“Use get_db_schema to show all tables.”
“Who works in Engineering?”
“List employees with their department names.”
“Average salary by department.”
Related MCP server: MySQL MCP Server
Tech stack
Python 3.10+
MCP Python SDK (
mcp, FastMCP)Cursor with project MCP config (
.cursor/mcp.json)
Prerequisites
Quick start
1. Create database and sample data
In MySQL Workbench or the CLI:
CREATE DATABASE IF NOT EXISTS lexiguard;
USE lexiguard;
CREATE TABLE IF NOT EXISTS departments (
id INT AUTO_INCREMENT PRIMARY KEY,
name VARCHAR(100) NOT NULL,
location VARCHAR(100)
);
CREATE TABLE IF NOT EXISTS employees (
id INT AUTO_INCREMENT PRIMARY KEY,
first_name VARCHAR(50) NOT NULL,
last_name VARCHAR(50) NOT NULL,
email VARCHAR(100) UNIQUE,
department_id INT,
hire_date DATE,
salary DECIMAL(10, 2),
FOREIGN KEY (department_id) REFERENCES departments(id)
);
INSERT INTO departments (name, location) VALUES
('Engineering', 'London'),
('HR', 'Manchester'),
('Finance', 'Birmingham');
INSERT INTO employees (first_name, last_name, email, department_id, hire_date, salary) VALUES
('Alice', 'Smith', 'alice.smith@lexiguard.com', 1, '2022-03-15', 65000.00),
('Bob', 'Jones', 'bob.jones@lexiguard.com', 1, '2021-07-01', 72000.00),
('Carol', 'Brown', 'carol.brown@lexiguard.com', 2, '2020-11-20', 48000.00),
('David', 'Taylor', 'david.taylor@lexiguard.com', 3, '2023-01-10', 55000.00);2. Install Python dependencies
Windows (PowerShell):
cd db-mcp-server
python -m venv .venv
.\.venv\Scripts\pip install -r requirements.txtmacOS / Linux:
cd db-mcp-server
python3 -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt3. Configure environment
cp .env.example .envEdit .env with your MySQL settings (especially MYSQL_PASSWORD if root has a password).
4. Connect Cursor
This repo includes project-level MCP config at .cursor/mcp.json.
Open this folder as a Cursor workspace.
Go to Cursor Settings → Models → MCP.
Enable
lexiguard-hr(should show 2 tools).Restart Cursor if the server does not appear.
macOS / Linux: Update .cursor/mcp.json so command points to your venv Python, for example:
"command": "${workspaceFolder}/.venv/bin/python"Windows (default in this repo):
"command": "${workspaceFolder}/.venv/Scripts/python.exe"Credentials are loaded from .env via envFile—do not commit .env (it is in .gitignore).
5. Try it
Open chat (Ctrl+L / Cmd+L), use Agent mode, and allow MCP tool runs when prompted.
Project layout
db-mcp-server/
├── .cursor/
│ └── mcp.json # Cursor MCP launch config
├── server.py # MCP server (FastMCP + MySQL)
├── requirements.txt
├── .env.example # Copy to .env locally
├── .gitignore
├── README.md # This file (demo / setup)
└── MCP-HOW-IT-WORKS.md # Short technical notes on MCPSecurity notes
Read-only queries only in
query_hr_db(noINSERT/UPDATE/DELETE).Keep
.envlocal; use.env.exampleas a template for collaborators.Intended for local development demos, not production exposure of a database.
Troubleshooting
Issue | What to check |
MCP server red / disconnected | MySQL running; |
“Connection refused” | Start MySQL service; confirm |
Tools not listed | Reopen project folder; toggle MCP server; restart Cursor |
GitKraken MCP error | Unrelated third-party config in global |
Learn more
See MCP-HOW-IT-WORKS.md for a concise technical explanation of MCP and how this repo implements it.
License
Use and adapt freely for learning and demos.
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