Resend MCP Server

Sends emails via the Resend API from Claude Cowork.

There is an offical MCP server available from Resend at https://github.com/resend/resend-mcp

Tools

Related MCP server: IMAP MCP Server

Setup

1. Get a Resend API key

Go to resend.com/api-keys and create a key with Full access.

2. Verify a sending domain (or use the test domain)

If you don't have a domain verified yet, you can test by sending to your own email address using onboarding@resend.dev as the from address. Resend provides this for testing.

To send to anyone, add and verify your domain at resend.com/domains.

3. Build the server

cd resend-mcp-server
npm install
npm run build

4. Add to Claude Cowork

Open your Claude Cowork settings (or claude_desktop_config.json) and add:

{
  "mcpServers": {
    "resend": {
      "command": "node",
      "args": ["/ABSOLUTE/PATH/TO/resend-mcp-server/dist/index.js"],
      "env": {
        "RESEND_API_KEY": "re_xxxxxxxxx"
      }
    }
  }
}

Replace /ABSOLUTE/PATH/TO/resend-mcp-server with the actual path to this folder on your machine, and re_xxxxxxxxx with your real API key.

Restart Claude Cowork after saving.

Usage examples

Send a simple email:

"Send an email to alice@example.com with subject 'Hello' and body 'Hi Alice, just checking in!'"

Send HTML:

"Email bob@example.com a welcome message with a nice HTML layout"

Schedule for later:

"Send a follow-up email to the team tomorrow at 9am"

Check delivery:

"Did the email I sent earlier get delivered?"