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Prerequisites

Before you start, you’ll need:

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Guide

1

Install

Get the Resend Node.js SDK.
npm install resend
2

Set your API key

Store your API key in an environment variable in your .env file.
RESEND_API_KEY=re_xxxxxxxxx
Pass it to the constructor with process.env.RESEND_API_KEY. See Create an API key for the full setup.
3

Send email using HTML

The easiest way to send an email is by using the html parameter.
server.ts
import { Resend } from 'resend';

const resend = new Resend(process.env.RESEND_API_KEY);

(async function () {
  const { data, error } = await resend.emails.send({
    from: 'Acme <onboarding@resend.dev>',
    to: ['delivered@resend.dev'],
    subject: 'Hello World',
    html: '<strong>It works!</strong>',
  });

  if (error) {
    return console.error({ error });
  }

  console.log({ data });
})();

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Examples

Express (TypeScript)

Full Express app with TypeScript

Express (JavaScript)

Full Express app with JavaScript

Attachments

Send emails with file attachments

Templates

Send emails using Resend hosted templates

Scheduling

Schedule emails for future delivery

Audiences

Manage contacts and audiences

Domains

Create and manage sending domains

Inbound Webhooks

Receive and process inbound emails

Double Opt-in

Double opt-in subscription flow