Email Sending MCP

Email sending MCP 💌

This is a simple MCP server that sends emails using Resend's API. Why? Now you can let Cursor or Claude Desktop compose emails for you and send it right away without having to copy and paste the email content.

As an example, you could use this to run local scripts, chat with Claude, or process data and send the results to yourself or your team.

Built with:

Features

Send plain text and HTML emails
Schedule emails for future delivery
Add CC and BCC recipients
Configure reply-to addresses
Customizable sender email (requires verification)

Demo

https://github.com/user-attachments/assets/8c05cbf0-1664-4b3b-afb1-663b46af3464

Setup

Currently, you must build the project locally to use this MCP server. Then add the server in Cursor or Claude Desktop to use it in any Cursor or Claude Desktop chat.

Clone this project locally.

git clone https://github.com/resend/mcp-send-email.git

Build the project

npm install
npm run build

Setup Resend

Create a free Resend account and Create an API Key. To send to other addresses, you'll also need to verify your own domain.

Note

For more info on how to send emails with Resend, see the docs.

Cursor

Open Cursor Settings.

Open the command palette (cmd+shift+p on macOS or ctrl+shift+p on Windows) and choose "Cursor Settings".

Add the MCP server

Select "MCP" from the left sidebar and click "Add new global MCP server".

Add the following config:

{
  "mcpServers": {
    "resend": {
      "type": "command",
      "command": "node ABSOLUTE_PATH_TO_MCP_SEND_EMAIL_PROJECT/build/index.js --key=YOUR_RESEND_API_KEY"
    }
  }
}

You can get the absolute path to your build script by right-clicking on the /build/index.js file in Cursor and selecting Copy Path.

Possible arguments

--key: Your Resend API key (required)
--sender: Your sender email address from a verified domain (optional)
--reply-to: Your reply-to email address (optional)

Note

If you don't provide a sender email address, the MCP server will ask you to provide one each time you call the tool.

Test the sending

Now you can test out sending emails by going to email.md.

Replace the to: email address with your own
Select all text in email.md, and press cmd+l
Tell cursor to "send this as an email" in the chat (make sure cursor is in Agent mode by selecting "Agent" on lower left side dropdown).

Claude Desktop

Open Claude's Developer config file

Open Claude Desktop settings and navigate to the "Developer" tab. Click Edit Config.

Add the MCP server

Add the following config:

{
  "mcpServers": {
    "resend": {
      "command": "node",
      "args": [
        "ABSOLUTE_PATH_TO_MCP_SEND_EMAIL_PROJECT/build/index.js"
      ],
      "env": {
        "RESEND_API_KEY": "YOUR_RESEND_API_KEY",
      }
    }
  }
}

You can get the absolute path to your build script by right-clicking on the /build/index.js file in your IDE and selecting Copy Path.

Possible environment variables

RESEND_API_KEY: Your Resend API key (required)
SENDER_EMAIL_ADDRESS: Your sender email address from a verified domain (optional)
REPLY_TO_EMAIL_ADDRESS: Your reply-to email address (optional)

Note

If you don't provide a sender email address, the MCP server will ask you to provide one each time you call the tool.

Test the sending

Close and reopen Claude Desktop. Verify that the resend tool is available in the Claude developer settings.

Chat with Claude and tell it to send you an email using the resend tool.

Email Sending MCP

Integrations