---
title: ChatGPT
description: Add AdCrunch to ChatGPT as an app in developer mode.
---

:::tip

AdCrunch is a **remote MCP server** — there's nothing to install locally. You add it to ChatGPT as an app in developer mode, and you sign in the first time ChatGPT calls one of its tools.

:::

:::info[Developer mode is required]

ChatGPT connects a custom MCP server only in **developer mode**, and only on the web. OpenAI labels developer mode as an elevated risk. It is for paid plans. On Business, Enterprise and Edu, an admin may need to turn it on for you. The menus below can change as OpenAI changes ChatGPT.

:::

## Install

1. **Turn on developer mode**

    In ChatGPT on the web, open **Settings → Security and login** and turn on
    **Developer mode**.

2. **Create the app**

    Go to [chatgpt.com/plugins](https://chatgpt.com/plugins) and click the **+**
    button. Enter the name `AdCrunch` and a short description. Under
    **Connection**, enter `https://mcp.adcrunch.dev/mcp` and choose **OAuth**.
    Create the app. It shows under **Drafts**.

3. **Use it in a chat**

    In a new conversation, open the **+** menu, choose **Developer mode**, and
    select AdCrunch.

4. **Sign in**

    The first time ChatGPT calls an AdCrunch tool, your browser opens the
    AdCrunch sign-in. Sign in and approve the access.

The consent screen does not ask for an organization. ChatGPT acts for the organization that is active in your most recent AdCrunch session. [Auth & scopes](/mcp/auth#which-organization-your-client-acts-for) explains how to choose it.

## Try it

Ask ChatGPT: _"List my advertisers."_ It calls `list_advertisers` and reads back the result.

If that works, go to the [Quickstart](/quickstart#ten-minutes-start-to-finish) for a first question and a first change.

:::warning[Approve each change yourself]

ChatGPT asks you to confirm each tool that can write before it calls it. You can remember a confirmation for one conversation. A tool such as `meta_update_budget` changes what runs on your ad account, so read each request before you confirm it.

:::

## Troubleshooting

:::warning[AdCrunch is not callable in a chat]

Select AdCrunch for each conversation, from **Developer mode** in the **+** menu. If the app fails to create, check that the URL is exactly `https://mcp.adcrunch.dev/mcp` and that developer mode is on. After AdCrunch adds or changes a tool, open [chatgpt.com/plugins](https://chatgpt.com/plugins) and click **Refresh** on the app.

:::