Run OpenAI Codex Inside Claude Code via MCP
How to Use OpenAI Codex Inside Claude Code with MCP Claude Code is already capable of inspecting repositories, editing files, running commands, and coordinating complex engineering work. But there are times when you may want Claude to delegate a focused task to OpenAI Codex—for example: Ask Codex to implement a change while Claude reviews it. Use Codex for a second independent code review. Let Codex clean up a technical review document. Run a repeatable Codex skill from a Claude Code session. Use Claude as the orchestrator and Codex as a specialist execution agent. The cleanest way to build this workflow is through the Model Context Protocol , or MCP. However, the phrase “install Codex inside Claude” can create the wrong mental model. Codex is not inserted into the Claude model. Instead, Claude Code launches Codex as a separate local process and communicates with it through an MCP tool interface. Claude orchestrates. Codex executes. Claude verifies. Alt text: Claude Code connecte...