Resend

Resend (https://resend.com) is an email platform for developers. This plugin wires the official Resend remote MCP server into the agent, so email is sent under the user's own Resend account via OAuth, no API key is ever placed in agent context.

Tools

Tool names are prefixed mcp_resend__. The server exposes Resend's email infrastructure, including:

• send, schedule, and batch transactional emails
• manage audiences, contacts, and broadcasts
• manage domains and inspect API logs

Exact tool names and schemas come from live discovery; prefer the discovered tool descriptions over assumptions.

Sending email

• Always confirm the recipient, subject, and body with the user before sending unless they provided all three explicitly.
• Use a from address on a domain verified in the user's Resend account. If the user has no verified domain, onboarding@resend.dev works for testing but can only deliver to the account owner's own address.
• Prefer plain text bodies unless the user asks for HTML.
• After sending, report the email id returned by the tool.

When Resend is not connected

The Resend MCP server uses OAuth. If Resend tools are missing from the tool list, or a call fails with an authentication error, tell the user to connect Resend under Settings → Connections (provider "Resend"), then retry. Do not ask the user for a Resend API key.