Ai Agents MCP Pg

The PostgreSQL MCP Server is a model context protocol service that allows LLMs to interact with PostgreSQL databases, providing functions such as table creation, data CRUD operations, and schema inspection, and supports operations through the Claude desktop application.

Database Developer tools #Database interaction #CRUD operations #LLM integration Local .TypeScript

rating : 2.5 points

downloads : 30

update time : 2025-04-29

What is the PostgreSQL MCP Server?

The PostgreSQL MCP Server is middleware that bridges large language models (LLMs) and PostgreSQL databases. It allows AI assistants to directly interact with the database through a standard protocol, enabling data management tasks without writing complex code.

How to use the PostgreSQL MCP Server?

After configuring the connection through Claude Desktop, you can describe data operation requirements in natural language, and the AI will automatically convert them into database operation instructions. Typical workflow: 1) Configure the Docker container. 2) Connect to Claude. 3) Start the dialogue interaction.

Use cases

Suitable for scenarios that require rapid prototype development, data analysts to explore data, educational demonstrations of database operations, and any scenario where users want to manage databases through natural language.

Main features

Schema explorationAutomatically discover the database table structure and provide complete field type and relationship information.

Create, Read, Update, Delete (CRUD)Support complete create, read, update, and delete operations, including batch data processing.

Transactional queryAll queries are executed within a transaction to ensure data consistency. Read operations use read-only transactions by default.

Schema managementDynamically create/delete table structures and support the definition of constraints such as primary keys and foreign keys.

Advantages and limitations

Advantages

Operate the database without SQL knowledge

Reduce the usage threshold through natural language interaction

Cover complete database operations, from table structures to data

Simple and fast containerized deployment

Limitations

Manual SQL optimization is still required for complex queries

It is recommended to use native connections in performance-sensitive scenarios

Currently only supports PostgreSQL databases

How to use

Prepare the Docker environment

Ensure that Docker Desktop is installed and the service is started.

Start the PostgreSQL container

Create a database instance using the standard image.

Configure Claude Desktop

Modify the configuration file to add the MCP server connection information.

Usage examples

E-commerce data modelingCreate associated user, order, and payment table structures with complete foreign key constraints.

Sales data analysisQuery the details of orders that have been paid within a specific time period.

Frequently Asked Questions

How to reset the test database?

Does it support other databases such as MySQL?

What is the maximum amount of data it can handle?

Related resources

Official GitHub repository

Project source code and the latest version.

PostgreSQL documentation

Official database reference documentation.

Docker installation guide

Docker installation instructions for various platforms.

🚀 PostgreSQL MCP Server

The PostgreSQL MCP Server is a powerful tool that combines the robustness of PostgreSQL with specific MCP - related functionalities, providing a reliable data - management and processing environment.

🚀 Quick Start

This guide will walk you through the installation process of the PostgreSQL MCP Server step by step.

📦 Installation

Step 1: Download PostgreSQL

Visit the PostgreSQL official website to download the version suitable for your operating system.

Step 2: Install PostgreSQL

Follow the installation guide provided by your operating system to complete the installation process.

Step 3: Configure the Database

Open the PostgreSQL configuration file (postgresql.conf) and make the following settings:
```
listen_addresses = '*'
port = 5432
```
Start the PostgreSQL service and apply the changes.

Step 4: Create the MCP Database

Log in to the database using the PostgreSQL command - line tool:
```
psql -U postgres
```
Create a new database:
```
CREATE DATABASE mcp;
```

Grant user privileges to the MCP user:

GRANT ALL PRIVILEGES ON DATABASE mcp TO mcp_user;
\q

Step 5: Install the MCP Server

Clone the MCP repository to your local computer.
Navigate to the project directory and run the installation script:
```
cd mcp - server
npm install
```

Configure the MCP environment variables:

export DB_NAME=mcp
export DB_USER=mcp_user
export DB_PASSWORD=your_password
export DB_HOST=localhost
export DB_PORT=5432

Start the MCP server:
```
node index.js
```

Step 6: Test the Installation

Visit http://localhost:3000 to check if the MCP server is running properly.

💻 Usage Examples

Database Entries

mydatabase=# SELECT * FROM users;
 id |     name     |       email       | created_at 
----+--------------+-------------------+------------+
  1 | John Doe     | john@example.com  | 2024-01-01
  2 | Jane Smith   | jane@example.com  | 2024-01-05
  3 | Mike Johnson | mike@example.com  | 2024-01-08
  4 | Sarah Wilson | sarah@example.com | 2024-01-09
  5 | Tom Brown    | tom@example.com   | 2024-01-11
(5 rows)

mydatabase=# SELECT * FROM payments;
 id | user_id | amount |    status    | payment_date 
----+---------+--------+--------------+--------------
  1 |       1 |  99.99 | completed    | 2024-01-10
  2 |       2 | 149.99 | completed    | 2024-01-12
  4 |       4 | 199.99 | UNSUCCESSFUL | 2024-01-13
  5 |       5 | 399.99 | IN_PROGRESS  | 2024-01-13
  3 |       3 |  99.99 | completed    | 2024-01-11
(5 rows)

mydatabase=# SELECT * FROM orders;
 id | user_id | product_name | order_date 
----+---------+---------------+------------
  1 |       1 | Laptop        | 2024-01-01
  2 |       2 | Phone         | 2024-01-05
  3 |       3 | Headphones    | 2024-01-08
  4 |       4 | Mouse         | 2024-01-09
  5 |       5 | Keyboard      | 2024-01-11
(5 rows)

📄 License

The source code and related documentation of the PostgreSQL MCP Server are protected by the MIT License. Please refer to the LICENSE file in the project directory for the full license text.

MIT License

Copyright (c) [Year] [Author's Name]

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.