codex

codex is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from anhnguyen0905/codex-mcp. Its token cost is not measured, scanned A, original, MIT.

An MCP server that connects Claude Code with the OpenAI Codex command-line tool for planning, executing, and reviewing work. It runs locally from a published npm package and requires the CODEX_MCP_TERMINAL environment variable.

In plain words
What is it for?
Use it to connect Claude Code to Codex CLI and coordinate planning, execution, and review tasks.
Why use it?
It provides a bridge between the two coding tools so they can be used together in a plan-and-review workflow.

MCP server for Claude CodeCodexCursorGemini CLIOpenCode

Part of the codex-flow plugin — 55 skills, 1 command, 1 MCP server shipped together

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/anhnguyen0905/codex-mcp/codex
Clone the repo
git clone --depth 1 https://github.com/anhnguyen0905/codex-mcp

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

Or install codex-flow, the plugin that ships this one along with the rest of its 55 skills, 1 command, 1 MCP server.

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 codex

README.md
[![agentmods](https://agentmods.dev/badge/mcp/anhnguyen0905/codex-mcp/codex.svg)](https://agentmods.dev/mcp/anhnguyen0905/codex-mcp/codex)
Your own site
<a href="https://agentmods.dev/mcp/anhnguyen0905/codex-mcp/codex"><img src="https://agentmods.dev/badge/mcp/anhnguyen0905/codex-mcp/codex.svg" alt="Measured on agentmods" 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. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

codex 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.

.mcp.json · 13 lines

What it actually says

{
  "codex": {
    "_note": "Runs the published npm tarball, which ships a prebuilt dist/ — no clone-time build, so a fresh plugin install connects immediately. The version is pinned deliberately: @latest would let a plugin release drift onto a server build it was never tested against. scripts/check-release-consistency.mjs enforces that this pin matches package.json. Dev note: to test local source instead, override with `claude mcp add-json -s local codex '{\"command\":\"node\",\"args\":[\"dist/index.js\"]}'` after `npm run build`.",
    "command": "npx",
    "args": [
      "-y",
      "@anhnguyen0905/[email protected]"
    ],
    "env": {
      "CODEX_MCP_TERMINAL": "1"
    }
  }
}
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 Changed ddc09450ed46
  2. 4d ago First seen · 13 lines scan A 20e441c22b84

Subscribe to this mod's changes

codex is an MCP server published in the GitHub repository anhnguyen0905/codex-mcp (3 stars, last pushed yesterday), licensed MIT. 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 2026-08-31.