A local command-line connection to a PostgreSQL database, which is a system for storing and querying structured application data. It runs a database toolbox server using connection settings supplied through environment variables.

Connecting to a PostgreSQL server by specifying its database, user, password, host, port, and optional query settings.

It provides a configured way for other tools to interact with a PostgreSQL database without manually assembling the server command.

postgresql — MCP server by gemini-cli-extensions

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.

agentmods

npx agentmods add mcp/gemini-cli-extensions/postgres/postgresql

Clone the repo

git clone --depth 1 https://github.com/gemini-cli-extensions/postgres

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

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. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

postgresql 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 2d ago.

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.

.codex-plugin/.mcp.json · 20 lines

What it actually says

{
  "postgresql": {
    "command": "npx",
    "args": [
      "-y",
      "@toolbox-sdk/[email protected]",
      "--prebuilt",
      "postgres",
      "--stdio"
    ],
    "env_vars": [
      "POSTGRES_DATABASE",
      "POSTGRES_USER",
      "POSTGRES_PASSWORD",
      "POSTGRES_HOST",
      "POSTGRES_PORT",
      "POSTGRES_QUERY_PARAMS"
    ]
  }
}

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.

2d ago First seen · 20 lines scan A adb424b5042a

Subscribe to this mod's changes

postgresql is an MCP server published in the GitHub repository gemini-cli-extensions/postgres (97 stars, last pushed 5d ago), licensed Apache-2.0. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. 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 2026-08-30.

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