Emailit

Emailit plugin for ChatGPT, Codex, Claude, Cursor, and Grok

The official Emailit plugin. It connects your AI assistant to the hosted Emailit MCP server, so it can send transactional email, check delivery, set up and verify sending domains, investigate bounces, manage contacts and audiences, run campaigns and automations, and configure webhooks. It also ships skills that teach the assistant how to integrate the Emailit API and SDKs into your code.

You sign in with your Emailit account through OAuth and choose which workspaces the plugin can use: all of them, or only the ones you select. Change that later under Account > Connected apps > Edit access. No API key is stored in the plugin.

What is included

Part	Description
MCP server	https://api.emailit.com/mcp, 113 tools across emails, domains, DMARC, templates, audiences, contacts, suppressions, campaigns, automations, forms, verification, webhooks, events, API keys, and workspaces
emailit skill	Choosing MCP or REST, safe sending, IDs, errors, and the full tool list
emailit-get-started skill	Connect, confirm the workspace, check a domain, send a first test email
emailit-domain-setup skill	Add a domain, publish DNS records at any provider, verify, and fix failures
emailit-deliverability skill	Bounces, spam placement, suppressions, DMARC reports, and list verification
emailit-campaigns skill	Audiences, contacts, campaigns, automations, and signup forms
emailit-webhooks skill	Events, filters, signature verification, retries, and debugging
emailit-sdk skill	Node, Python, PHP, Laravel, Go, Ruby, Java, .NET, Rust, and SMTP
Cursor rule	Keeps Emailit keys and webhook secrets out of source code

Install

ChatGPT

Open Plugins, search for Emailit, and choose Connect. Sign in, choose the workspaces to allow, and approve access.

Codex

codex plugin marketplace add emailit/plugins

Open /plugins, install Emailit, and sign in when prompted.

Claude

On claude.ai, Claude Desktop, or mobile: Settings > Connectors > Browse connectors, search for Emailit, and choose Connect.

In Claude Code:

claude plugin marketplace add emailit/plugins
claude plugin install emailit@emailit

Then run /mcp, select emailit, and choose Authenticate.

Cursor

Install Emailit from the Cursor Marketplace, then choose Connect next to emailit in Settings > MCP.

Grok

grok plugin marketplace add emailit/plugins
grok plugin install emailit --trust

On grok.com, open Connectors > New Connector > Custom and enter https://api.emailit.com/mcp.

Access and security

• OAuth 2.1 with PKCE. Your assistant never sees your password. The assistant requests sending access (send and manage sent email), full access (everything), or both, which is the default. The consent page lists what it will be able to do, and you choose which workspaces it can use.
• Confirmation before impact. Tools that send email, delete data, or call external URLs carry MCP annotations that let your client ask you first, and the skills tell the assistant to confirm. The Emailit server does not enforce the confirmation itself; whether you are asked depends on your client and its settings.
• Revoke at any time in the Emailit dashboard under Account > Connected apps.
• API keys stay with Emailit. The MCP server signs in with OAuth and needs no key. Only when it isn't connected do the skills use an Emailit API key from your environment, and only to call Emailit's own REST API (listed below). Code the SDK skill writes into your project reads the key the same way.
• Headless clients (the xAI API, CI jobs) can send an Emailit API key as Authorization: Bearer <key> to the same server. Use a sending scope key where you can.

To expose fewer tools, add ?toolsets=emails,domains or ?read_only=true to the server URL, or send the X-MCP-Toolsets and X-MCP-Readonly headers.

Endpoints this plugin uses

The plugin talks only to Emailit:

Endpoint	Purpose
https://api.emailit.com/mcp	Hosted MCP server (Streamable HTTP)
https://api.emailit.com/.well-known/oauth-protected-resource/mcp	OAuth resource metadata
https://api.emailit.com/.well-known/oauth-authorization-server	OAuth server metadata
https://api.emailit.com/oauth/register	Dynamic client registration
https://api.emailit.com/oauth/authorize	Sign in and consent
https://api.emailit.com/oauth/token	Token exchange and refresh
https://api.emailit.com/oauth/revoke	Token revocation
https://api.emailit.com/v2	REST API, used by code that the SDK skill writes into your project
smtp.emailit.com:587	SMTP, used only if your project is configured for it

Requirements

An Emailit account. Sending needs a verified sending domain; the emailit-get-started skill walks you through it.

Development

This repository is published from Emailit's main repository, where every change is validated against each directory's rules and the skills are tested with evals. The validation tooling and evals aren't published: nobody who installs the plugin needs them. skills/emailit/references/tools.md is generated from the Emailit MCP server catalog. Report problems to [email protected].

This repository is published from Emailit's main repository, and each release replaces its contents. Please report problems and suggestions as issues rather than pull requests.

File	Read by
plugin.json, mcp.json	ChatGPT, Codex, and other Agent Plugins clients
.cursor-plugin/	Cursor
.claude-plugin/, .mcp.json	Claude Code, Claude directory, Grok
.grok-plugin/plugin.json	Grok
.agents/plugins/marketplace.json	Codex marketplace

Support

emailit.com/contact or [email protected]. Documentation: Emailit plugins and skills and the hosted MCP server guide. Privacy policy: emailit.com/privacy-policy.

License

MIT