pg-mcp-server is a Model Context Protocol server that bridges AI agents and PostgreSQL databases. It exposes schema metadata (tables, columns, indexes, foreign keys) as MCP resources, and lets agents execute read-only SQL queries or transactional writes. Ideal for developers who want Claude, Cursor, or other LLM-powered tools to answer questions about a live database without manual SQL. Supports connection string configuration, SSL modes, and Row-level security awareness.