6 lessons

Codex MCP Course

Learn Codex by Building an MCP

One practical path: build a working MCP server, connect it to Codex, test it, and ship it.

Start Lesson 1 Back to Course

Lessons

1

What Codex + MCP Actually Do

Understand the core model: Codex drives work, MCP exposes tools and context.

10 min
2

Scaffold an MCP Server

Create a minimal TypeScript MCP server with one clean entry point.

20 min
3

Add Your First Tool

Implement one useful tool with strict input validation and clear output.

25 min
4

Connect the Server to Codex

Register the MCP server in your Codex setup and invoke the tool from chat.

15 min
5

Test, Debug, Iterate

Add fast feedback loops so your MCP behaves reliably under real prompts.

25 min
6

Ship and Extend

Package your server, document usage, and define the next tools to add.

10 min