PostgreSQL MCP Server (Model Context Protocol)
@VivekMalipatel
About PostgreSQL MCP Server (Model Context Protocol)
FastMCP Based MCP Server to Control Postgres
Config
Add this server to your MCP-compatible client using the configuration below.
{
"mcpServers": {
"Postgres_MCP_Server": {
"command": "python",
"args": [
"-m",
"venv",
".mcp"
]
}
}
}Tools
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Overview
What is PostgreSQL MCP Server?
A FastMCP-powered Model Context Protocol server that gives AI assistants (Claude, Cursor, etc.) full, structured access to a PostgreSQL database — no SQL knowledge required from the user.
How to use PostgreSQL MCP Server?
Clone the repository, create a virtual environment, install dependencies from requirements.txt, and configure a .env file with database credentials. Then connect an MCP-compatible client (e.g., Claude Desktop) by adding the provided JSON block to its MCP config file. Alternatively, run manually with python postgres_mcp_server.py.
Key features of PostgreSQL MCP Server
- Exposes database as MCP Resources (read-only) and MCP Tools (read/write)
- Parameterised queries throughout — no SQL injection
- Structured stdout logs on every tool/resource call
- Schema inspection: list tables, column definitions
- Read/write/DDL operations via tools
- Raw SQL execution via the
execute_querytool
Use cases of PostgreSQL MCP Server
- AI assistant querying database in natural language
- Automated schema exploration and data preview
- Performing insert, update, delete operations through conversational interface
- Creating and dropping tables via AI assistant
FAQ from PostgreSQL MCP Server
What transport does PostgreSQL MCP Server use?
The server uses stdio transport (MCP protocol over standard input/output).
What are the runtime requirements?
Python 3.8+ and a PostgreSQL server (local or remote) with the uv package runner (recommended) or pip.
How are database credentials configured?
Via a .env file with POSTGRES_HOST, POSTGRES_PORT, POSTGRES_DB, POSTGRES_USER, and POSTGRES_PASSWORD, or directly in the client config's env block.
What dependencies are required?
mcp[cli], asyncpg, psycopg2-binary, python-dotenv, httpx, uvicorn, and uv.
What are the limits on data access?
The postgres://data/{table_name} resource returns only the first 100 rows as a safe preview. Other tools allow configurable limits.
Frequently asked questions
What transport does PostgreSQL MCP Server use?
The server uses stdio transport (MCP protocol over standard input/output).
What are the runtime requirements?
Python 3.8+ and a PostgreSQL server (local or remote) with the `uv` package runner (recommended) or `pip`.
How are database credentials configured?
Via a `.env` file with `POSTGRES_HOST`, `POSTGRES_PORT`, `POSTGRES_DB`, `POSTGRES_USER`, and `POSTGRES_PASSWORD`, or directly in the client config's `env` block.
What dependencies are required?
`mcp[cli]`, `asyncpg`, `psycopg2-binary`, `python-dotenv`, `httpx`, `uvicorn`, and `uv`.
What are the limits on data access?
The `postgres://data/{table_name}` resource returns only the first 100 rows as a safe preview. Other tools allow configurable limits.
Basic information
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