Best MCP servers for OpenAI Codex (2026)

These are the 30 most popular open-source MCP servers for OpenAI Codex, ranked by GitHub stars. Each one links to a page with repository details, install configs where available, and related servers.

Git (official) Official – Tools to read, search, and manipulate Git repositories.
Everything (official) Official – Reference / test server with prompts, resources, and tools.
ruflo ★74702 – 🌊 The original agent harness. Deploy intelligent multi-player swarms, coordinate autonomous workflows, and build conver
context7 ★63052 – Context7 Platform -- Up-to-date code documentation for LLMs and AI code editors
chrome-devtools-mcp ★53558 – Chrome DevTools for coding agents
codebase-memory-mcp ★46608 – High-performance code intelligence MCP server. Indexes codebases into a persistent knowledge graph — average repo in mil
github-mcp-server ★33622 – GitHub's official MCP Server
serena ★30271 – A powerful MCP toolkit for coding, providing semantic retrieval and editing capabilities - the IDE for your agent
context-mode ★29252 – Context window optimization for AI coding agents. Sandboxes tool output (98% reduction), persists session memory, and
activepieces ★25058 – AI Agents & MCPs & AI Workflow Automation • (~400 MCP servers for AI agents) • AI Automation / AI Agent with MCPs • AI W
n8n-mcp ★23073 – A MCP for Claude Desktop / Claude Code / Windsurf / Cursor to build n8n workflows for you
Auto-claude-code-research-in-sleep ★17497 – ARIS ⚔️ (Auto-Research-In-Sleep) — Lightweight Markdown-only skills for autonomous ML research: cross-model review loops
hexstrike-ai ★12793 – HexStrike AI MCP Agents is an advanced MCP server that lets AI agents (Claude, GPT, Copilot, etc.) autonomously run 150+
mcp-use ★10762 – The fullstack MCP framework to develop MCP Apps for ChatGPT / Claude & MCP Servers for AI Agents.
Trail-Code ★10034 – Turbocharge Claude Code, Cursor, Codex, Gemini & every coding agent: faster, cheaper, with contextual understanding spec
MobileBuildMCP ★6479 – A Model Context Protocol (MCP) server and CLI that provides tools for agent use when working on iOS and macOS projects.
semble ★6209 – Fast and Accurate Code Search for Agents. Uses 99% fewer tokens than grep+read
open-seo-mcp-skills ★5496 – Free SEO MCP server + open-source SEO and GEO skills for Claude: keyword research, rank tracking, audits, backlinks, AI
zotero-mcp ★5397 – Zotero MCP: Connects your Zotero research library with Claude and other AI assistants via the Model Context Protocol to
code-graph-rag ★5258 – The ultimate RAG for your monorepo. Query, understand, and edit multi-language codebases with the power of AI and knowle
exa-mcp-server ★5130 – Exa MCP for web search and web crawling!
tradingview-mcp ★5060 – TradingView MCP server — real-time market data, technical analysis, screeners & backtesting for Claude, ChatGPT, Cursor
marketing-skills ★4584 – Claude skills for marketing: 49 free marketing skills for Claude Code and claude.ai (Google Ads, Meta Ads, SEO, AI visib
Unity-MCP ★4461 – AI Skills, MCP Tools, and CLI for Unity Engine. Full AI develop and test loop. Use cli for quick setup. Efficient token
excel-mcp-server ★4241 – Excel MCP server: let AI (Claude, Cursor, Codex) create and edit Excel files with charts, PivotTables, slicers and formu
design-extract ★4237 – Extract any website's complete design system with one command. DTCG tokens, semantic+primitive+composite, MCP server for
fast-agent ★3936 – Code, Build and Evaluate agents - excellent Model and Skills/MCP/ACP/A2A Support
linkedin-mcp-server ★3875 – Open-source MCP server for LinkedIn. Give Claude and any MCP-compatible AI agent access to profiles, companies, jobs, an
hyperresearch ★3856 – Convert Claude Code or Codex into the most intelligent Deep Research Agent. Collect, search, and synthesize web research
pipeshub-ai ★3833 – The open-source context layer for AI agents. PipesHub turns your company's knowledge (Slack, Drive, Jira, GitHub, Micros

Frequently asked questions

What is an MCP server for OpenAI Codex?

An MCP (Model Context Protocol) server connects AI assistants such as Claude, Cursor or GitHub Copilot in VS Code to external tools and data. The servers on this page are focused on OpenAI Codex.

How is this list ranked?

By GitHub stars and recent activity, using public repository data refreshed on October 15, 2026.

How do I install one?

Most servers are added to your client’s MCP config file as an npx, uvx or Docker command. Our install guides for Claude Desktop, Cursor and VS Code walk through it step by step.

Setup: How to add MCP servers to OpenAI Codex (config.toml)

Related guides

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