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Devin is an autonomous AI software engineer that can connect to external services through MCP (Model Context Protocol) servers. Adding Resend’s MCP server gives Devin native access to send emails, manage contacts and broadcasts, verify domains, and more. For the full list of capabilities, see the MCP Server overview.

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Prerequisites

Before you start, make sure you have:

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1. Open Devin Settings

In Devin, open the Settings menu from your account dropdown.

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2. Go to Connections > MCP Servers

In the Settings sidebar, click Connections, then select the MCP Servers tab. Click Add a custom MCP. Selecting MCP Servers under Connections in Devin

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3. Add the Resend MCP configuration

Click Import JSON and paste the following configuration into the modal. 
{
  "mcpServers": {
    "resend": {
      "command": "npx",
      "args": ["-y", "resend-mcp"],
      "env": {
        "RESEND_API_KEY": "re_xxxxxxxxx",
        "SENDER_EMAIL_ADDRESS": "onboarding@resend.dev"
      }
    }
  }
}
Pasting the Resend MCP configuration in Devin

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4. Update the Environment Variables

Scroll down and update the environment variables:
  • RESEND_API_KEY: delete this and add it as a secret (below).
  • SENDER_EMAIL_ADDRESS: update this with your sender email address you’ve verified in the Resend Dashboard.
Update the environment variables

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5. Add the Resend API key as a secret

Add the RESEND_API_KEY as a secret. Click Save secret to confirm. Adding the Resend API key as a Devin secret
You can create a new API key in the Resend Dashboard.

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6. Confirm and enable the MCP server

Add a description, click Install and Enable, and confirm in the dialog. Devin will install the server and mark it as connected. Confirming the Resend MCP server in Devin

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7. Test the connection

Ask Devin to send a test email. For example: 
Send a test email to delivered@resend.dev using the Resend MCP server. Subject: "Hello from Devin".
Devin will call the Resend MCP server and confirm the send.