MCP Servers

pg-mcp

Enables read-only PostgreSQL database access with query, table listing, and schema inspection tools.

README

neurovia-labs-pg-mcp

A lightweight MCP server for read-only PostgreSQL access. Maintains a persistent connection pool and exposes query tools for use with Claude Code or any MCP client.

Tools

Tool	Description
`query`	Run a read-only SQL query (SELECT, WITH, EXPLAIN)
`list_tables`	List all tables in a schema
`describe_table`	Show columns and types for a table

Usage

With `npx` (no install)

Add to your .mcp.json:

{
  "mcpServers": {
    "db": {
      "command": "npx",
      "args": ["github:NeuroviaLabs/pg-mcp"],
      "env": {
        "DATABASE_URL": "postgresql://user:pass@host:5432/dbname"
      }
    }
  }
}

Local

git clone git@github.com:NeuroviaLabs/pg-mcp.git
cd pg-mcp
npm install

Add to your .mcp.json:

{
  "mcpServers": {
    "db": {
      "command": "node",
      "args": ["db-server.js"],
      "env": {
        "DATABASE_URL": "postgresql://user:pass@host:5432/dbname"
      }
    }
  }
}

The connection URL can also be passed as a CLI argument:

node db-server.js postgresql://user:pass@host:5432/dbname

Features

Persistent connection pool (max 5 connections)
Read-only enforcement (SELECT/WITH/EXPLAIN only + read-only transactions)
30s query timeout
SSL support

License

ISC

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