How-to

Emailit for Codex

Connect OpenAI Codex to Emailit with the Emailit plugin or codex mcp add, then build and test email features from the agent.

Updated Oct 2, 2026

Codex connects to the hosted Emailit MCP server with the same Emailit plugin used in ChatGPT. The plugin adds the server plus skills for domain setup, deliverability, campaigns, webhooks and SDK code.

Install the plugin

In the ChatGPT desktop app, open Codex, go to Plugins, search for Emailit and install it.

In the Codex CLI, add the Emailit marketplace:

Terminal

codex plugin marketplace add emailit/emailit-plugins

Then run /plugins, install Emailit and sign in to Emailit when prompted.

Add only the server

Terminal

codex mcp add emailit --url https://api.emailit.com/mcp
codex mcp login emailit

codex mcp login opens a browser to sign in to Emailit, choose your workspaces and allow access.

The same entry in ~/.codex/config.toml:

~/.codex/config.toml

[mcp_servers.emailit]
url = "https://api.emailit.com/mcp"

Try it

“Which Emailit workspace am I connected to?”

“Add transactional email to this project with the Emailit Python SDK and send a test to me@example.com.”

“Create a webhook for email.bounced events that points at our staging endpoint, and write the signature check.”

Disconnect

Open AccountConnected apps and choose Revoke access next to Codex. Running codex mcp logout emailit only signs Codex out locally.

See the tool reference for everything Codex can do, and MCP troubleshooting if something doesn’t work.