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Email sending (used by Deploya.dev)

Compose and send emails directly from your LLM applications without the hassle of copying and pasting. Integrate seamlessly with Resend's API to streamline your email communication. Enhance your productivity by letting your agents handle email tasks effortlessly.

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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.

Built with:

DEMO

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

Cursor

First, you need to authorize Resend to send emails from your domain or email. Follow the steps here to set that up and get a Resend API key.
Clone this project locally. Edit index.ts and replace me@yoko.dev to your own email to send emails from
Run npm install, npm run build under the project dir. You should now see a /build/index.js generated - this is the MCP server script!

Then go to Cursor Settings -> MCP -> Add new MCP server

Name = [choose your own name]
Type = command
Command: node ABSOLUTE_PATH_TO_MCP_SERVER/build/index.js --key=YOUR_RESEND_API_KEY --sender=OPTIONAL_SENDER_EMAIL_ADDRESS --reply-to=OPTIONAL_REPLY_TO_EMAIL_ADDRESS_ONE --reply-to=OPTIONAL_REPLY_TO_EMAIL_ADDRESS_TWO

You can get Resend API key here: https://resend.com/

Now you can test out sending emails by going to email.md, replace the to: email address, select all in email md, and hit cmd+l. You can now tell cursor to "send this as an email" in the chat. Make sure Cursor chat is in Agent mode by selecting "Agent" on lower left side dropdown

Claude desktop

Same set up as above, and then add the following MCP config

{
  "mcpServers": {
    "resend": {
      "command": "node",
      "args": ["ABSOLUTE_PATH_TO_MCP_SERVER/build/index.js"],
      "env": {
        "RESEND_API_KEY": [YOUR_API_KEY],
        "SENDER_EMAIL_ADDRESS": [OPTIONAL_SENDER_EMAIL_ADDRESS],
        "REPLY_TO_EMAIL_ADDRESSES": [OPTIONAL_REPLY_TO_EMAIL_ADDRESSES_COMMA_DELIMITED]
      }
    }
  }
}

Installing via Smithery

To install mcp-send-email for Claude Desktop automatically via Smithery:

npx -y @smithery/cli install @ykhli/mcp-send-email --client claude

Develop

npm install npm run build