# OpenAI Codex App

## Content

> **Version note**
> 
> As of **July 9, 2026**, the Codex app has been integrated into the ChatGPT app.
> If you are using the new ChatGPT app, see [OpenAI ChatGPT App](https://developer.mescius.com/mcp/docs/configure-your-ai-client/desktop-and-chat-clients/openai-chatgpt-app)
> If you are using the legacy Codex app, continue with this document.

1\. Open OpenAI Codex Desktop and go to `Settings`.
2\. Open `MCP servers` and click `Add Server`.
3\. Enter the MCP server settings:

* Name: `spreadjs-mcp`
* Type: `Streamable HTTP`
* Endpoint: `https://developer.mescius.com/mcp/spreadjs`
* Header name: `Authorization`
* Header value: `Bearer <YOUR_MCP_TOKEN>`

4\. Click `Save`.
![](https://cdn.mescius.io/document-site-files/images/8258313f-94ec-48f2-929c-4f1bd0c4cac5/image-20260603-060342-20260617.c993e0.png?width=800)
5\. Restart Codex App\. The MCP server may not take effect until the app is restarted\.
6\. After restarting\, confirm that `spreadjs-mcp` appears in the MCP servers list.
![](https://cdn.mescius.io/document-site-files/images/8258313f-94ec-48f2-929c-4f1bd0c4cac5/CodexApp-02-20260617.2265c7.png?width=800)

Reference: [Codex app MCP setting](https://developers.openai.com/codex/app/settings#integrations--mcp "https://developers.openai.com/codex/app/settings#integrations--mcp")