mcpg

mcpg is a plugin for Cursor from devopam/MCPg. Its token cost is not measured, scanned A, original, MIT.

A PostgreSQL MCP server for querying, tuning, and operating PostgreSQL databases. PostgreSQL is a relational database system, and this server uses read-only access by default.

In plain words
What is it for?
Use it to run database queries, investigate or tune PostgreSQL, and perform broader database operations when the configured access mode permits them.
Why use it?
It lets an agent inspect and work with PostgreSQL while making read-only access the safer starting point.

Plugin for Cursor

Written for Cursor: a Cursor plugin manifest.

Good fit Use it to run database queries, investigate or tune PostgreSQL, and perform broader database operations when the configured access mode permits them.

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Install with agentmods
npx agentmods add plugins/devopam/mcpg/mcpg
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/devopam/MCPg

Made for: Cursor.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for mcpg

README.md
[![agentmods](https://agentmods.dev/badge/plugins/devopam/mcpg/mcpg/github.svg)](https://agentmods.dev/plugins/devopam/mcpg/mcpg)
Your own site
<a href="https://agentmods.dev/plugins/devopam/mcpg/mcpg"><img src="https://agentmods.dev/badge/plugins/devopam/mcpg/mcpg/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for mcpg

Your own site · 80×15
<a href="https://agentmods.dev/plugins/devopam/mcpg/mcpg"><img src="https://agentmods.dev/badge/plugins/devopam/mcpg/mcpg.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

mcpg scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured today.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.cursor-plugin/plugin.json · 41 lines

What it actually says

{
  "name": "mcpg",
  "version": "0.8.3",
  "description": "Production-grade PostgreSQL MCP server: query, tune, and operate Postgres — read-only by default.",
  "author": {
    "name": "Devopam Mittra",
    "email": "[email protected]"
  },
  "homepage": "https://github.com/devopam/MCPg",
  "repository": "https://github.com/devopam/MCPg",
  "license": "MIT",
  "keywords": [
    "postgresql",
    "postgres",
    "database",
    "sql",
    "mcp",
    "pgvector"
  ],
  "logo": "docs/assets/logo-400.png",
  "mcpServers": "packaging/cursor/mcp.json",
  "variables": {
    "type": "object",
    "properties": {
      "MCPG_DATABASE_URL": {
        "type": "string",
        "title": "PostgreSQL connection URL",
        "description": "e.g. postgresql://user:password@localhost:5432/mydb — remote hosts need ?sslmode=require."
      },
      "MCPG_ACCESS_MODE": {
        "type": "string",
        "title": "Access mode",
        "description": "read-only (default, safe) | restricted (allows write tools) | unrestricted (DBA surface; pair with MCPG_ALLOW_DDL etc.).",
        "default": "read-only",
        "enum": ["read-only", "restricted", "unrestricted"]
      }
    },
    "required": ["MCPG_DATABASE_URL"]
  }
}
Contents

What it installs

The manifest is a name and a version. 1 MCP server travel with it, and installing the plugin installs all of them. Each is measured on its own page, and each can be installed alone.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. today First seen · 41 lines scan A 782dfc8f24c1

Subscribe to this mod's changes

mcpg is a plugin published in the GitHub repository devopam/MCPg (14 stars, last pushed today), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-29.

Related

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