hybrid server

The server is able to function both locally and remotely, depending on the configuration or use case.

Integrations

Supports configuration via .env files for database credentials and connection settings
Includes CI/CD integration through GitHub Actions workflows
Provides testability with Jest for ensuring server reliability and performance

SQL MCP Server (TypeScript)

This project provides a TypeScript implementation of a Model Context Protocol (MCP) server that enables language models and other MCP-compatible clients to query PostgreSQL databases—via SSH bastion tunnels when required.

Built for flexibility and secure database access, it supports AWS RDS with read-only transactions and uses stdin/stdout-based communication, making it suitable for local, containerized, or AI-driven use cases.

Features

🔒 SSH bastion support for secure access to private RDS instances via SSH tunnels
🐘 PostgreSQL read-only query engine using the pg library
📡 STDIO-based MCP protocol transport
🧠 Compatible with memory-bank-mcp-server
⚙️ Easily configurable via .env or environment variables
🧪 Fully testable with Jest and mocks

Installation

Clone the repository and install dependencies:

git clone https://github.com/your-org/sql-mcp-server.git
cd sql-mcp-server
npm install
npm run build

Configuration (Optional .env file)

Create a .env file in the project root:

DB_USER=postgres
DB_PASS=yourpassword
DB_HOST=localhost
DB_PORT=5432
DB_NAME=mydatabase
USE_SSH_TUNNEL=true
SSH_BASTION_HOST=bastion.example.com
SSH_BASTION_USER=ec2-user
SSH_PRIVATE_KEY_PATH=~/.ssh/id_rsa

Usage

Run the server using npx:

npx -y @modelcontextprotocol/server-postgres postgresql://<user>:<pass>@localhost:5433/<dbname>

For direct connection without SSH tunneling, set the appropriate environment variables:

DB_HOST=rds-host.amazonaws.com DB_PORT=5432 npx -y @modelcontextprotocol/server-postgres postgresql://<user>:<pass>@rds-host.amazonaws.com/<dbname>

Sample Input

{
  "type": "call_tool",
  "params": {
    "name": "query",
    "arguments": {
      "sql": "SELECT * FROM users LIMIT 10"
    }
  }
}

Sample Output

{
  "content": [
    {
      "type": "text",
      "text": "[{\"id\":1,\"name\":\"Alice\"}]"
    }
  ],
  "isError": false
}



⸻

Related Docs
	•	Architecture
	•	Domain Models
	•	Glossary
	•	Coding Standards
	•	Tech Stack
	•	User Guide

⸻

License

MIT

⸻

Contribution Guide

We welcome community contributions! Please see CONTRIBUTING.md for details.

⸻

Compatibility

This implementation follows the Model Context Protocol (MCP) and has been tested for compatibility with:
	•	memory-bank-mcp-server
	•	Claude Desktop (via STDIO)
	•	Cursor IDE
	•	Supabase + MCP integration

This server cannot be installed

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security - not tested

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license - not found

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quality - not tested

A TypeScript implementation of a Model Context Protocol server that enables language models to securely query PostgreSQL databases, including those behind SSH bastion tunnels.

Integrations

SQL MCP Server (TypeScript)

Features

Installation

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