> ## Documentation Index
> Fetch the complete documentation index at: https://docs.langmail.me/llms.txt
> Use this file to discover all available pages before exploring further.

# ChatGPT

> Add the Langmail MCP server to ChatGPT as a custom connector in developer mode.

ChatGPT supports custom MCP connectors through developer mode.

## Prerequisites

* A Langmail account — [sign up at app.langmail.me](https://app.langmail.me).
* A ChatGPT plan with custom connectors (Plus, Pro, Business, Enterprise, or Edu). On Business and Enterprise workspaces, an admin must allow custom connectors first.

## Connect

<Steps>
  <Step title="Enable developer mode">
    Open **Settings → Apps & Connectors** (on some plans **Connectors**), scroll to **Advanced settings**, and turn on **Developer mode**.
  </Step>

  <Step title="Add the Langmail connector">
    Back in **Apps & Connectors**, choose **Create** and fill in:

    * **Name**: `Langmail`
    * **MCP server URL**: `https://mcp.langmail.me/mcp`
    * **Authentication**: OAuth
  </Step>

  <Step title="Authorize access">
    ChatGPT starts the authorization flow: sign in to your Langmail account and approve the consent screen.
  </Step>

  <Step title="Enable it in a chat">
    In a conversation, open the tools menu, choose **Developer mode**, and enable **Langmail**. The connector stays active for the rest of the conversation.
  </Step>
</Steps>

## Test it

Ask ChatGPT:

```text Prompt theme={null}
Search my Langmail inbox for the 5 most recent messages.
```

It calls `search_emails` with `{ "mailbox": "Inbox", "limit": 5 }` and answers from the result.

## Ending access

Remove the connector from **Settings → Apps & Connectors**. Removing it discards its tokens; without the refresh token, access lapses when the current access token expires.

## Next steps

<CardGroup cols={2}>
  <Card title="Search and triage email" icon="magnifying-glass" href="/guides/search-and-triage">
    Real prompts and the tool calls they produce.
  </Card>

  <Card title="How authorization works" icon="key" href="/connect/authorization">
    What happens between "add connector" and "connected".
  </Card>
</CardGroup>