PostgreSQL MCP Server

What is PostgreSQL MCP Server?

PostgreSQL MCP Server is a Go-based MCP (Model Context Protocol) server that lets AI assistants interact with PostgreSQL databases through a standardized interface. It provides three main capabilities: executing SELECT queries, managing database schema with DDL, and modifying data with INSERT/UPDATE/DELETE — all with built-in security validation to prevent dangerous operations.

How to use PostgreSQL MCP Server?

Install by building the Go binary from source (requires Go 1.19+). Update the database connection string in main.go or use environment variables for credentials. Run the binary as a stdio transport server. Connect any MCP client (e.g., Claude Desktop) by adding the server to its configuration file, specifying the path to the binary. Use the three tools — execute_query, ddl_query, modify_query — for respective operations.

Key features of PostgreSQL MCP Server

• Three validated SQL tools: query, DDL, and modify.
• Blocks dangerous commands like TRUNCATE and GRANT.
• Uses GORM for input sanitization and SQL injection protection.
• Supports SSL for database connection security.
• Compatible with all MCP clients using stdio transport.

Use cases of PostgreSQL MCP Server

• Let an AI assistant answer business intelligence queries from a PostgreSQL database.
• Enable AI to create and modify database tables for schema management.
• Allow AI to insert, update, or delete records with validation.
• Give AI read-only access to user analytics or inventory data.