How to Add MCP Servers to OpenAI Codex CLI

Snyk

Sep 8, 2025

In this video, I’ll walk you through the step-by-step process of adding MCP servers into OpenAI’s Codex CLI. Whether you’re just getting started with the Codex command-line tool or you want to expand its functionality by connecting external MCP servers, this guide will help you set it up quickly and correctly.

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✍️ Resources ✍️
Snyk MCP: https://snyk.co/mcp-docs
Context7: https://context7.com/
OpenAI Codex CLI: https://developers.openai.com/codex/cli

⏲️ Chapters ⏲️

00:00 - Intro

00:24 - The MCP servers we will be setting up

00:47 - Why this method is tedious...

01:34 - Setting up the Context7 MCP server

03:24 - Using the Context7 MCP server

05:52 - Setting up the Snyk MCP server

06:32 - Using the Snyk MCP server

08:46 - Outro

⚒️ About Snyk ⚒️

Snyk helps you find and fix vulnerabilities in your code, open-source dependencies, containers, infrastructure-as-code, software pipelines, IDEs, and more! Move fast, stay secure.

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