Getting started

Overview

Build integrations with the Resent API

A unified REST API for sending messages across email, SMS, and WhatsApp — and managing domains, API keys, contacts, and deliverability from one platform.

Where to start

New to the Resent API?

Make your first API call in minutes. The quickstart walks you through authentication and your first request.

Know what you need?

Browse API solutions by product area below, or jump to the API reference for full endpoint details.

Install an SDK

$npm install resent.one

Node.js SDK documentation → · Framework guides →

Framework guides

Send email from your frontend and backend stack:

Next.js · Remix · Nuxt · Astro · SvelteKit · React · Vue · Express · Fastify · Hono · Koa · NestJS · RedwoodJS · Bun · Cloudflare Workers · Vercel · AWS Lambda · Deno · Electron · Node.js

All framework guides →

Explore by use case

Common integration scenarios and implementation guides.

Send transactional emails

Send order confirmations, password resets, and other automated emails to your users.

Read guide

Send transactional SMS & WhatsApp

Reach your customers through transactional SMS and WhatsApp templates.

Read guide

Track with webhooks

Receive real-time notifications about email, SMS, and WhatsApp events.

Read guide

Manage contacts

Import, update, and organize your contact lists programmatically.

Read guide

Batch send email

Send customized emails to multiple recipients in a single request with dynamic variables.

Read guide

Schedule email

Schedule emails to be sent at a specific time in the future.

Read guide

Verify a sending domain

Add SPF/DKIM records and verify your domain before mailing third parties.

Read guide

Configure SMTP relay

Configure the Resent SMTP relay to send email from your existing stack.

Read guide

Parse inbound emails

Receive and process incoming emails through webhooks for support and replies.

Read guide

API solutions

Explore the most popular integration areas available on the Resent platform.

Messaging API

Send transactional emails, SMS, and WhatsApp messages. Batch send, schedule deliveries, and track message activity.

Marketing platform

Build campaigns and templates. Manage audiences and landing pages for your outbound programs.

CRM

Sync contacts, companies, and deals. Keep customer data connected to your messaging workflows.

Conversations

Manage conversations across channels and keep reply context in one place.

Webhooks

Receive real-time event notifications for email, SMS, WhatsApp, and delivery activity.

Domains & API keys

Verify sending domains and create keys with full_access or sending_access permissions.

Reference & tools

Authentication

Set up Bearer API key authentication to access the Resent API.

Rate limits

Understand API rate limits, quotas, and how to handle rate limit responses.

SDKs

Official and community clients for calling the Resent API from your stack.

Key concepts

Learn base URLs, required headers, response codes, and request patterns.

Dashboard

Create keys, verify domains, and send from the Resent dashboard.

MCP Server

Integrate Resent docs with AI assistants using the Model Context Protocol.