High-throughput transactional email for AWS Lambda, Vercel & Cloudflare

import { SadaSend } from 'sadasend';

const sadasend = new SadaSend(process.env.SADASEND_API_KEY!);

export default async function handler(req: Request): Promise<Response> {
  const { recipient, orderId } = await req.json();

  const result = await sadasend.emails.send({
    from: 'billing@yourdomain.com',
    to: recipient,
    subject: `Order Confirmation #${orderId}`,
    html: `<p>Your order <strong>#${orderId}</strong> is confirmed.</p>`,
    tags: ['serverless', 'order-confirm']
  });

  return new Response(JSON.stringify({ id: result.id }), {
    status: 200,
    headers: { 'Content-Type': 'application/json' }
  });
}