> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.markup.ai/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.markup.ai/_mcp/server.

# ChatGPT with Markup AI MCP

> Install the Markup AI plugin from ChatGPT's Plugins directory and run content agents in your chats.

Chat

## Overview

Markup AI is listed in ChatGPT's **Plugins** directory. Install the plugin to use the hosted Markup AI MCP server in ChatGPT without setting up a custom connector.

You'll need a Markup AI account. If you don't have one yet, you can create it while you install the plugin.

## Install the Markup AI Plugin

#### Open the Markup AI listing

Open the [Markup AI plugin listing](https://chatgpt.com/plugins/plugin_asdk_app_69aabb9fed388191a27178a825825f4d). You can also click **Plugins** in the ChatGPT sidebar and search for `Markup AI`.

#### Install the plugin

Log in to ChatGPT if you aren't already, then click **Install plugin**. On a managed workspace, an admin may need to enable the plugin for your workspace first.

#### Sign up or log in to Markup AI

After you install the plugin, ChatGPT redirects you to Markup AI.

* **New to Markup AI:** Create your Markup AI account.
* **Already have an account:** Log in to your Markup AI account.

Then click **Allow Access** to authorize the plugin. After a few seconds, ChatGPT returns and shows Markup AI as connected.

#### Verify

Start a new chat and ask ChatGPT to use Markup AI. You can do this in two ways:

* **Mention the plugin:** Type `@Markup AI` in the message composer, followed by your request. For example: `@Markup AI review what I wrote`.
* **Refer to Markup in your prompt:** For example: `Draft a blog post about migrating birds and then review it with Markup`.

## Test Your Setup

* "@Markup AI check this paragraph for brand-voice drift: \[paste text]"
* "@Markup AI how would a skeptical buyer react to this copy? \[paste text]"
* "@Markup AI list the available agents."
* "Draft a blog post about migrating birds and then review it with Markup."

You should see ChatGPT call Markup AI tools to analyze your text.

## Troubleshooting

* If you can't install the plugin on a Business, Enterprise, or Edu workspace, ask your workspace admin to enable Markup AI.
* If ChatGPT doesn't call Markup AI, start your message with `@Markup AI` so ChatGPT knows to use the plugin.
* If you previously added Markup AI as a custom connector in Developer mode, remove that connector after installing the plugin to avoid seeing duplicate tools.

## Add Markup AI as a Custom Connector

If you can't install the plugin from the Plugins directory, you can add the hosted Markup AI MCP server to ChatGPT as a custom connector in Developer mode instead.

#### Set up a custom connector in Developer mode

> **Note**
>
> Developer mode is available to Plus, Pro, Business, Enterprise, and Edu accounts on the web. ChatGPT supports remote MCP servers only. Connectors authenticate with OAuth login; if you need to authenticate with an API key, use [Codex](/mcp/codex-mcp) or [Claude Code](/mcp/claude-code-mcp) instead.

#### Enable Developer mode

1. Open ChatGPT → **Settings → Apps & Connectors**.
2. Scroll to **Advanced settings** at the bottom and toggle on **Developer mode**. (On a managed workspace, an admin may need to allow it under **Permissions & Roles**.)

#### Create a custom connector

1. Back on **Settings → Apps & Connectors**, click **Create**.
2. Fill in the details:
   * Name: `Markup AI`
   * Description (optional): `Markup AI content agents`
   * MCP Server URL: `https://api.markup.ai/mcp/`
   * Authentication: **OAuth**
3. Check the box to confirm you trust this connector, then click **Create**.

#### Log in to Markup AI

1. ChatGPT redirects you to log in to your Markup AI account.
2. Click **Allow Access** to authorize the connector.
3. After a few seconds, ChatGPT returns and shows Markup AI as connected.

#### Verify

Start a new chat, click the **+** button near the message composer, choose **More**, and confirm Markup AI appears in the list of available tools. Enable it for the conversation, then prompt ChatGPT to use it.

If the connector doesn't appear, make sure **Developer mode** is still enabled and you're on a supported plan. If tools look stale after a change, open the connector in **Settings → Apps & Connectors** and click **Refresh**.

## Links

* Markup AI plugin listing: [https://chatgpt.com/plugins/plugin_asdk_app_69aabb9fed388191a27178a825825f4d](https://chatgpt.com/plugins/plugin_asdk_app_69aabb9fed388191a27178a825825f4d)
* Developer mode and MCP connectors in ChatGPT: [https://help.openai.com/en/articles/12584461-developer-mode-apps-and-full-mcp-connectors-in-chatgpt-beta](https://help.openai.com/en/articles/12584461-developer-mode-apps-and-full-mcp-connectors-in-chatgpt-beta)