Data & Analytics

Resend Email API

Send transactional emails with Resend using React Email templates and reliable delivery infrastructure.

Claude Code Cursor Copilot Windsurf Gemini CLI

Overview

Resend is a modern email API built for developers, offering a simple REST API for sending transactional and marketing emails. It integrates with React Email, allowing you to build email templates using React components with familiar patterns like props, conditional rendering, and composition. The developer experience is designed to feel like building web pages rather than wrestling with HTML email quirks.

The Resend Node.js SDK provides a clean API for sending single emails, batch emails, and managing contacts and audiences. It supports custom domains with automatic DKIM/SPF/DMARC configuration, email analytics (opens, clicks, bounces, complaints), and webhooks for delivery events. Attachments, reply-to headers, CC/BCC, and scheduling are all supported.

Resend provides a generous free tier of 3,000 emails per month with 100 emails per day. The infrastructure is built on AWS SES with additional deliverability optimizations. The dashboard provides real-time delivery analytics, domain health monitoring, and suppression list management. Resend is particularly popular in the Next.js ecosystem and integrates well with Vercel serverless functions.

Who Is This For?

Send transactional emails with React Email templates
Set up welcome email sequences for new users
Build password reset and verification email flows
Track email delivery with webhooks and analytics

Installation

Setup for Claude Code

npm install resend

Configuration

import { Resend } from "resend"

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

await resend.emails.send({
  from: "onboarding@myapp.com",
  to: "user@example.com",
  subject: "Welcome to MyApp!",
  react: WelcomeEmail({ name: "John" }),
  // or html: "<h1>Welcome!</h1>"
})