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Prerequisites

To get the most out of this guide, you’ll need to:

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1. Install

Get the Resend Node.js SDK. 
yarn workspace api add resend

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2. Send email using HTML

yarn rw g function send
The easiest way to send an email is by using the html parameter.
api/src/functions/send/send.ts
import { Resend } from 'resend';
import type { APIGatewayEvent, Context } from 'aws-lambda';

const resend = new Resend('re_xxxxxxxxx');

export const handler = async (event: APIGatewayEvent, context: Context) => {
  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 {
      statusCode: 500,
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ error }),
    };
  }

  return {
    statusCode: 200,
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ data }),
  };
};

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3. Try it yourself

Send Email

Basic email sending

Attachments

Send emails with file attachments

Inline Images (CID)

Embed inline images using CID

Templates

Send emails using Resend hosted templates

Scheduling

Schedule emails for future delivery

Audiences

Manage contacts and audiences

Domains

Create and manage sending domains

Webhooks

Handle webhook events

Double Opt-in

Double opt-in subscription flow