Skills and MCP servers for Codex

OpenAI's coding agent: runs tasks in your repository from the terminal and editor, and connects MCP servers.

OpenAIAgent website (opens in a new tab)

Download Codex

11 downloadsLinks checked

Not available in Russia. OpenAI does not list Russia among supported countries.

Official sources only: the developer site and app stores. No mirrors or third-party builds.

How to connect to Codex

What the agent reads

  • SKILL.md
  • plugins
  • MCP
  • AGENTS.md

Where skills go

For all projects
~/.agents/skills/
In the project folder
.agents/skills/

Install with one command

npx skillfoxx add skills/skills-for-real-engineers --agent codex

Example for “Skills for real engineers by Matt Pocock”. Any entry installs the same way, by its catalog address. The CLI checks the recipe signature and writes the Codex settings itself.

Skills

715 entriesAll 715

Small composable skills for engineering with agents: plan grilling, TDD, bug diagnosis, code review and architecture

Minimal access306.3KRepository stars16Installs in 30 days

Official shadcn/ui skill and MCP server: the agent searches registries, adds components via the CLI and follows the library's rules

Extended access126.9KRepository stars

The official FastAPI skill, bundled with the package, teaching agents to write code for the installed version

Minimal access104.3KRepository stars

A frontend design skill with 23 commands, live browser iteration and 61 detector rules for common AI-generated UI tells

Broad access94.1KRepository stars18Installs in 30 days

Skills and CLI from HeyGen: the agent writes HTML compositions and renders them into MP4 videos, captions, motion graphics and decks

Extended access75.5KRepository stars

A skill that builds editable PPTX decks from PDF, DOCX, URLs and Markdown with native shapes, charts and animations

Extended access70.5KRepository stars

MCP servers

375 entriesAll 375
Official

An open-source crawler that turns websites into clean Markdown for AI agents: install from PyPI, run in Docker and connect to Claude Code over MCP

Extended access86.5KRepository stars

An MCP server built into the Netdata agent: metrics, logs, alerts and live process, service and container data for an AI assistant

Extended access81.2KRepository stars
Official

Local context compression for agents: tool outputs, logs, files and RAG chunks shrink before reaching the LLM. Proxy, CLI, library and MCP

Broad access78.3KRepository stars
Official

Local memory for agents: stores conversations and project files verbatim and retrieves them with semantic search over MCP

Extended access59.8KRepository stars
Official

A long-term memory system for AI agents: the agent stores experience and facts, then retrieves them through a built-in MCP server

Broad access55.9KRepository stars
Official

The Chrome DevTools team's official MCP server: the agent drives a live Chrome, reads network and console, and records performance traces

Extended access54.4KRepository stars

CLI tools

301 entriesAll 301

Open-source personal AI assistant on your own machine: answers in Telegram, Slack, Discord and WhatsApp, extended with skills and plugins

Broad access393.4KRepository stars

GitHub toolkit for spec-driven development: the specify CLI adds agent commands and skills to a project, from principles to implementation

Extended access143.9KRepository stars
Needs a VPN

OpenAI's coding agent that runs locally in your terminal, with IDE and desktop versions

Broad access131.6KRepository stars

CLI, skill and Python library for browser control: the agent clicks, fills forms and reads pages over CDP

Broad access119.5KRepository stars

A local gateway for Claude Code, Codex, OpenCode and other agents: pick model providers, route requests, set fallbacks and read logs

Broad access37.9KRepository stars

A skill package manager: installs, finds, updates and removes SKILL.md packages from GitHub and other git hosts across many agents

Extended access37.1KRepository stars

Plugins

212 entriesAll 212

A skills library that gives coding agents a development process: brainstorming, planning, TDD, subagents and code review

Extended access307.8KRepository stars

Memory layer for agents: plugins for Claude Code, Codex, Cursor and OpenCode, plus a CLI and SDKs that carry context across sessions

Extended access68.1KRepository stars
Needs a VPN

OpenAI's official plugin: Codex reviews of your changes and task delegation to Codex from inside a Claude Code session

Extended access34.7KRepository stars

A plugin from Every: a brainstorm, plan, build, review and capture loop so each next task gets easier

Broad access25.8KRepository stars
Needs a VPN

Three skill plugins for Google Stitch: screen generation, code to design and React builds from mockups

Extended access8.6KRepository stars

Trail of Bits skills

Trail of Bits Skills Marketplace

Trail of Bits plugin marketplace for security work: smart contracts, C/C++ and Rust review, Semgrep, CodeQL and fuzzing

Extended access7.9KRepository stars

Workflows

32 entriesAll 32

Job search inside your coding agent: scores each listing against your CV from 1 to 5, tailors a PDF resume, drafts letters and tracks applications

Extended access78.7KRepository stars

Spec-driven development for coding agents: proposal, requirements, design and tasks come before any code

Extended access73.4KRepository stars

A skill set for agile development with an agent: from idea and PRD to architecture, stories, implementation and review

Extended access54.7KRepository stars

Agentic video studio for Claude Code, Cursor and Codex: script, voiceover, images, stock footage, music, subtitles and render

Extended access73KRepository stars
Needs a VPN

A Claude Code workflow where the agent searches job postings, scores fit against your profile, drafts a CV and cover letter, and helps prepare for interviews

Extended access67.5KRepository stars

A spec-driven development framework for coding agents: a discuss, plan, execute, verify and ship loop run in fresh contexts

Broad access11KRepository stars

Prompts

4 entries

A structured prompt system: templates with role, profile, skills, rules and workflow for repeatable model requests

Minimal access12.7KRepository stars

The Chinese edition of agency-agents: hundreds of expert roles for Claude Code, Cursor, Copilot and other agents, including China-market roles

Minimal access21.7KRepository stars

System instructions and targeted reminders for GPT in Codex: fewer ceremonies, more decisions and careful craft

Extended access499Repository stars
Russian stack

A Claude Code prompt that sets up a 1C project structure with coding standards, role agents, skills and MCP

Extended access16Repository stars

In short

Codex can be extended with skills, MCP servers, CLI tools, and plugins from the catalog to enhance coding, design, memory, browsing, and development workflows. Skills like FastAPI and shadcn/ui provide official support for specific frameworks, while MCP servers such as MemPalace and Hindsight offer memory and context management. CLI tools like Codex CLI and Browser Use enable local coding and browser control, and plugins add capabilities for code review, planning, and security analysis.

FAQ

how do i add a skill to codex?

Use the skills (npx skills) CLI to install and manage skill packages compatible with Codex.

which tools provide memory support for codex?

MemPalace and Hindsight MCP servers provide local and long-term memory, while the Mem0 plugin offers a memory layer across sessions.

is there an official codex plugin for code review?

Yes, the Codex plugin for Claude Code is an official plugin that enables Codex to review changes and delegate tasks within Claude Code.