Run your email marketing from Claude, ChatGPT or Cursor
Connect Hemero to the AI app you already work in. Ask for a campaign, a report or a list of contacts in plain words, and nothing reaches your audience until you say so. Setup is one click and a browser sign-in: no key to paste.
Availability
The connector is live today on every account. Open Settings, API tab, Connect your AI agent, or use the buttons below.
What you can ask your agent to do
By area, an agent connected to Hemero can work with campaigns (drafts, content, estimates, scheduling, results, test emails and, with your confirmation, sending), contacts, lists, imports and suppressions, segments, email templates, signup forms, automations, sending domains and brands, webhooks, and your account (plan, credits, usage and settings). Anything irreversible asks for your confirmation, and some actions are limited to owners and admins. The in-app assistant and the connector use the same account, so what one creates the other can open.
“Create a campaign for my Shopify customers and send it after I check it.”
The agent builds a draft, shows you the content and an estimate of who it reaches and what it costs, and sends only after you confirm.
“How did last week's newsletter do?”
It reads the campaign's results, opens, clicks, bounces and unsubscribes, and tells you in a few lines.
“Add these 50 contacts to my VIP list.”
Paste them in the chat. Addresses are checked, and people who unsubscribed or are suppressed are never subscribed again. The agent asks you to confirm that they agreed to hear from you.
Set up in one click
The connector address is https://hemero.app/mcp. Every app signs in to Hemero through your browser, so there is no API key to copy. The Settings page in your account (API tab) shows the same buttons and, on a test server, its own address.
Claude (claude.ai and Desktop)
Add Hemero to Claude opens the connector dialog with the address filled in. If it does not open, go to Customize, Connectors, choose Add custom connector and paste https://hemero.app/mcp. On Team and Enterprise plans an owner adds it for the organization.
ChatGPT
Turn on developer mode in Settings (Apps, Advanced settings), then create an app, name it Hemero, paste https://hemero.app/mcp, choose OAuth and sign in. Where the options sit varies by plan and version, and workspaces may need an admin to allow it.
Cursor
Add Hemero to Cursor opens Cursor and installs the server. Sign in to Hemero when it asks.
VS Code
Add Hemero to VS Code installs the server, or use VS Code Insiders. Sign in to Hemero when it asks.
Claude Code
Run this command, then type /mcp in Claude Code and choose Hemero to sign in.
Codex CLI, Gemini CLI and Windsurf
Add the server to the client's config file, as shown below, and sign in when the client opens your browser. For Codex, run codex mcp login hemero.
Config for command-line clients
claude mcp add --transport http hemero https://hemero.app/mcp
Codex CLI, in ~/.codex/config.toml:
[mcp_servers.hemero]
url = "https://hemero.app/mcp"
Gemini CLI, in ~/.gemini/settings.json:
{
"mcpServers": {
"hemero": {
"httpUrl": "https://hemero.app/mcp"
}
}
}
Windsurf, in mcp_config.json:
{
"mcpServers": {
"hemero": {
"serverUrl": "https://hemero.app/mcp"
}
}
}
Any other app that supports remote MCP servers: add the address as a custom connector. If an app cannot sign in with a browser, create an API key in Settings, API tab, and send it as a Bearer token.
Security: you stay in control
Sign in with OAuth
You approve the connection on a Hemero page in your browser, naming the organization. Hemero never sees your agent's chats, and the agent never sees your password.
Read only or read and write
On the approval screen you choose whether the app can only read, or can also create drafts, templates, segments and contacts. Read only is the default.
Only the capabilities you tick
The agent starts with everyday work: contacts, templates, campaign drafts, reports and automations. Sending, domains, billing and team settings are separate options on the approval screen, off by default, so the agent also keeps a short, fast tool list. To change them later, disconnect and connect again.
Your role applies
The agent acts as you, with your role in the organization. It cannot do anything you could not do in Hemero, and sending a campaign is limited to owners and admins.
Nothing is sent without your yes
Sending a campaign, or anything else that cannot be undone or emails other people, needs an explicit confirmation each time. The agent is told to show you the content and the estimate first. New campaigns start as drafts.
Revoke any time
Settings, API tab, Connected apps lists every connection, who made it and when it was last used. Revoke one and it stops working at once. Connections also expire after 30 days.
Same safeguards as the app
Sending limits, unverified domains, suppression lists, credits and consent rules apply exactly as they do in the web app. Every action is recorded in the audit log.
Text from other people is data
Contact names and form answers are written by third parties. Hemero marks them as data for the agent, but as with any AI tool, review what it is about to do before you approve a send.
Questions
What is MCP?
Model Context Protocol is the open standard AI apps use to connect to other services. Hemero is a remote MCP server, so a compatible app can read and act in your account after you sign in.
Do I need an API key?
No. Claude, ChatGPT, Cursor, VS Code and the command-line clients sign in with your browser. An API key only works as a fallback for apps that cannot.
Can my agent send emails to my whole list by itself?
No. Sending needs an explicit confirmation in the same request, only owners and admins can send, and the agent is instructed to show you the content and an estimate first. You can also connect read only.
Does it cost extra?
No. The connector is free and included on every plan. Emails you send use your plan or balance like anywhere else: see the pricing page.
Which AI apps does it work with?
Any app that supports remote MCP servers over HTTP with OAuth. One-click setup is available for Claude, Cursor and VS Code, and there are steps for ChatGPT, Claude Code, Codex CLI, Gemini CLI and Windsurf. App menus change often, so follow the app's own wording if it differs.
Can it do everything the Hemero app does?
It covers most of what the web app does: campaigns, contacts and lists, segments, templates, forms, automations, domains, webhooks and your account. Some things need a browser, such as paying or connecting a store, and then the agent gives you the link to open in Hemero.
How do I disconnect an app?
Revoke it in Settings, API tab, Connected apps. It loses access immediately.
Let your AI app do the busywork. Create your account, add the connector in one click and ask for your first draft.