The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
For Codex
Tools for Codex
Most MCP servers work in Codex. Below: how to add one, 1,631 tools that mention Codex by name, and the most-starred MCP servers overall.
How to add an MCP server to Codex
1. Local server (stdio)
codex mcp add <name> -- npx -y <package>2. Or edit ~/.codex/config.toml
[mcp_servers.my-server]
command = "npx"
args = ["-y", "<package>"]
[mcp_servers.my-remote]
url = "https://example.com/mcp"3. OAuth servers
codex mcp login <name>Source: OpenAI Codex docs: MCP. Always review a server's code and permissions before connecting it.
Popular MCP servers
The most-starred MCP servers we track. Any of them can be added to Codex with the steps above.
Reverse engineer anything with agents, from app behavior down to native binaries.
Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations.
Build Agentic workflows, RAG pipelines, with rich AI model and tool support on one collaborative workspace. Deploy on cloud, VPC, or self-hosted, so teams move from prototype…
User-friendly AI Interface (Supports Ollama, OpenAI API, ...)
A cross-platform desktop All-in-One assistant for Claude Code, Codex, OpenCode, OpenClaw, Grok Build & Hermes Agent. Only official website: ccswitch.io
Open-source Python library for AI browser agents, plus Browser Use Cloud: stealth browsers and a hosted agent API.
An open-source AI agent that brings the power of Gemini directly into your terminal.
Give your AI agent eyes to see the entire internet. Read & search Twitter, Reddit, YouTube, GitHub, Bilibili, XiaoHongShu — one CLI, zero API fees.
Real-time global intelligence dashboard. AI-powered news aggregation, geopolitical monitoring, and infrastructure tracking in a unified situational awareness interface
Built for Codex
Tools that name Codex in their title, description or GitHub topics, ranked by stars.
The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
Reverse engineer anything with agents, from app behavior down to native binaries.
A cross-platform desktop All-in-One assistant for Claude Code, Codex, OpenCode, OpenClaw, Grok Build & Hermes Agent. Only official website: ccswitch.io
An AI skill that provides design intelligence for building professional UI/UX across multiple platforms.
Turn any codebase, with its docs, SQL schemas, configs, and PDFs, into a queryable knowledge graph. A /graphify skill for Claude Code, Cursor, Codex, and Gemini CLI: local…
Production-grade engineering skills for AI coding agents.
The 1st Collaborative AI Design Agent Workspace. Local-first and open source. Create prototypes, websites, apps, dashboards, presentations, images, and videos with your team…
Persistent Context Across Sessions for Every Agent – Captures everything your agent does during sessions, compresses it with AI, and injects relevant context back into future…
Agent skills that give coding agents taste: art direction, reference images and a browser check instead of generic AI pages
