---
title: "ChatGPT"
description: "Connect Unitpost to ChatGPT as a custom MCP connector — approve in the browser."
url: https://www.unitpost.com/docs/ai/chatgpt
section: MCP
updated: 2026-10-05
---
# ChatGPT

## Connection settings

- **Server URL**: https://mcp.unitpost.com/mcp
- **Transport**: Streamable HTTP
- **Auth (recommended)**: OAuth 2.1 — add the URL, approve in the browser (scopes match API capabilities; tokens refresh automatically)
- **Auth (legacy)**: Authorization: Bearer pk_live_YOUR_KEY (workspace API key from Settings → API keys; for clients that can only paste a key)
- **Tools**: one per API operation (email_send, email_campaigns_send, …)

## ChatGPT

> Connect Unitpost to ChatGPT as a custom MCP connector — approve in the browser.

Add the server URL as a custom MCP connector in ChatGPT and approve in the browser. The same connection works in the Codex app.

### 1. Connect with OAuth

In ChatGPT, open the MCPs tab and connect a custom MCP. Select Streamable HTTP, paste the server URL below, and complete the browser approval. No key to copy. Your client opens Unitpost in the browser — pick a workspace, approve the scopes, and you're connected. Tokens refresh automatically.

- MCP server URL: https://mcp.unitpost.com/mcp

> Custom MCP connectors may need developer mode, or a workspace admin on Business and Enterprise plans.

### 2. Verify

Start a chat with the unitpost connector enabled and ask ChatGPT to list your sending domains.

### 3. Send a test

Ask ChatGPT to send a test email from a verified domain. It asks you to confirm before sending; check the message in Unitpost Activity.

## Related

- [GitHub Copilot](https://www.unitpost.com/docs/ai/copilot): Connect VS Code agent mode to Unitpost with OAuth — approve in the browser. API key as fallback.
- [Gemini CLI](https://www.unitpost.com/docs/ai/gemini): Connect the Gemini CLI to Unitpost — OAuth in the browser, or a key block.
- [Grok](https://www.unitpost.com/docs/ai/grok): Add Unitpost to Grok Build as an HTTP MCP server — approve in the browser.