What Are the Best Codex Plugins to Install in 2026

Codex plugins, introduced in early 2026, expand the capabilities of OpenAI's Codex by integrating reusable packages that combine skills, app connectors, and MCP servers into one installable unit. These plugins enhance the reach and functionality of Codex, allowing it to connect seamlessly to a variety of external services like GitHub, Gmail, Slack, and more, while also shipping custom skills that activate based on task matches. The installation process is streamlined through the Plugin Directory, available in both the Codex App and CLI, enabling users to easily browse, install, and manage plugins. Key plugins like Firecrawl, Composio, Context7, and others offer specialized functions such as real-time web context, managed OAuth for SaaS apps, live documentation injections, and more, effectively turning Codex into a more versatile agent capable of understanding and interacting with APIs, design files, tickets, and the live web.