Resend Has a Free API — Email for Developers

#resend #email #api #webdev

Resend is an email API built for developers. Send transactional emails with a simple REST API — no SMTP configuration, no deliverability headaches.

What Is Resend?

Resend is an email sending platform with great DX. Built by the team behind React Email.

Free tier:

3,000 emails/month
100 emails/day
1 custom domain

REST API

curl -X POST https://api.resend.com/emails \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"from":"you@yourdomain.com","to":"user@example.com","subject":"Hello!","html":"<h1>Welcome</h1><p>Thanks for signing up.</p>"}'

Node.js SDK

import { Resend } from "resend";

const resend = new Resend("re_YOUR_API_KEY");

await resend.emails.send({
  from: "you@yourdomain.com",
  to: "user@example.com",
  subject: "Welcome!",
  html: "<h1>Welcome</h1>"
});

Python SDK

import resend

resend.api_key = "re_YOUR_API_KEY"

resend.Emails.send({
    "from": "you@yourdomain.com",
    "to": "user@example.com",
    "subject": "Hello",
    "html": "<p>Welcome aboard!</p>"
})

Use Cases

Transactional emails — welcome, receipts, alerts
Password resets — secure reset flows
Notifications — app notifications
Invoices — automated billing emails
Marketing — with React Email templates

Resend vs Alternatives

Feature	Resend	SendGrid	Postmark
Free tier	3K/mo	100/day	100/mo
DX	Excellent	Good	Good
React Email	Native	No	No
Webhooks	Yes	Yes	Yes

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