> Add SupWriter as a ChatGPT connector using Developer mode and call the humanizer, paraphraser, grammar checker, and AI detector inside your chat. Full setup.
- **Published**: 2026-05-24
- **Category**: Integrations
- **URL**: https://supwriter.com/blog/humanize-ai-text-in-chatgpt-mcp

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# How to Humanize AI Text Inside ChatGPT (Developer Mode Connector)

ChatGPT drafts beautifully and humanizes nothing. So the usual routine is: generate in ChatGPT, copy out, humanize elsewhere, paste back. Adding SupWriter as a connector collapses that into a single conversation — ChatGPT calls our humanizer, paraphraser, grammar checker, and AI detector as tools, with your permission, without leaving the chat.

ChatGPT is a little different from Claude here: custom MCP connectors live behind **Developer mode**, and they need a paid plan. Here's the exact flow.

## Before you start

- Use **ChatGPT on the web** (chatgpt.com). Custom connectors can't be added from the mobile apps yet.
- You need a **paid plan**: Plus, Pro, Business, Enterprise, or Edu. Custom connectors aren't available on the Free plan.
- On **Business/Enterprise**, a workspace admin can turn Developer mode off for everyone — if you don't see it, ask your admin.

## The 60-second version

Settings → **Apps & Connectors** → **Advanced settings** → turn on **Developer mode** → **Create** a connector with URL `https://supwriter.com/api/mcp` and **OAuth** auth → sign in to SupWriter → enable it in the chat. Then ask ChatGPT to humanize anything.

## Step 1: Turn on Developer mode

Click your profile picture (top-right) → **Settings** → **Apps & Connectors**. Scroll to the bottom, open **Advanced settings**, and toggle **Developer mode** on. Accept the warning — custom connectors run third-party tools on your behalf, so only add servers you trust.

(Some builds still label this tab **Connectors** rather than **Apps & Connectors** — it's the same place.)

## Step 2: Create the SupWriter connector

Back on the Apps & Connectors screen, click **Create**. Fill in:

- **Name** — `SupWriter`
- **Description** (optional) — "Humanize, paraphrase, grammar-check, and AI-detect text."
- **MCP Server URL** — paste:

```
https://supwriter.com/api/mcp
```

- **Authentication** — choose **OAuth**.

Tick **"I trust this application"** and click **Create**.

> ChatGPT connects to SupWriter over OAuth, not an API key — there's no field to paste a token. That's fine: SupWriter registers ChatGPT automatically, so you don't copy any client ID or secret.

## Step 3: Sign in and approve

A SupWriter window opens. Log in with your SupWriter account if you aren't already, then review the consent screen. It lists exactly what's being granted: humanize, paraphrase, grammar-check, and AI detection. Approve, and the connector is linked. (If a window doesn't appear, allow pop-ups for chatgpt.com.)

## Step 4: Enable it for the chat and make your first call

Connectors are turned on **per conversation**. In the message composer, open the **+** (or **Developer mode**) menu and switch **SupWriter** on. Then ask:

- *"Humanize the draft above with a professional tone."*
- *"Paraphrase this in academic mode."*
- *"Check this text against AI detectors and show me the flagged sentences."*

ChatGPT surfaces each tool call for you to **Confirm** before it runs, then drops the result back into the thread.

## Troubleshooting

- **The connector doesn't appear in a chat.** Make sure Developer mode is on, and that SupWriter is toggled on for that specific conversation — connectors are per-chat, and they aren't available in shared chats.
- **You don't see Developer mode at all.** It needs a paid plan and the web app; on Business/Enterprise it may be disabled by an admin.
- **You get asked to reconnect.** OAuth tokens are short-lived; just re-approve. Your SupWriter account stays linked.
- **`INSUFFICIENT_CREDITS` / `PLAN_LIMIT`.** You're out of word credits, or the text exceeds your plan's per-request cap (500 free/basic, 1,500 Pro, 3,000 Ultra). Trim the text or top up.
- **`LANGUAGE_NOT_AVAILABLE`.** That language needs a higher plan; English is available everywhere.

## What's next

It's the same connector behind the [humanizer](/blog/humanize-ai-text-mcp-server), [grammar checker](/blog/grammar-checker-mcp-server), [paraphraser](/blog/paraphraser-mcp-server), and [AI detector](/blog/ai-detection-mcp-server). Also using Claude or a code editor? See the guides for [Claude](/blog/humanize-ai-text-in-claude-mcp) and [Cursor, VS Code, Claude Code, Codex & OpenCode](/blog/humanize-ai-text-in-cursor-vscode-mcp).


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Source: https://supwriter.com/blog/humanize-ai-text-in-chatgpt-mcp