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In this guide, you’ll learn how to:
  • Connect your Resend account to Rocket.
  • Get your API key from Resend.
  • Add it securely in Rocket to start sending transactional emails from your app.
Why use Resend?Send transactional emails with high deliverability using Resend’s developer-friendly API. Resend focuses specifically on transactional emails, ensuring your welcome messages, order confirmations, and password resets reach users’ inboxes. Perfect for apps that need reliable email delivery.
What is Resend?
Resend is a modern email API designed for high deliverability and fast integration.
It is perfect for sending transactional emails like confirmations, alerts, and password resets.
Your API key stays safe with Rocket.
It is encrypted at rest and never exposed, so you can connect with confidence.

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Before you begin

You’ll need:
  • A Rocket account - rocket.new.
  • A Resend account.
  • Supabase connected (Rocket links emails to authenticated users).

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Connect Resend to Rocket

1

Get your Resend API key

Visit the Resend API Keys page to create or copy your key.
2

Connect Resend to Rocket

There are two ways to connect Resend to Rocket:Method 1: Use Rocket Chat (fastest)
  • In any project, open the chat panel and type something like:
    Connect my Resend account to:
  • Send a welcome email when a user signs up.
  • Send a confirmation email after a form is submitted.
  • Add a newsletter subscription flow with Supabase + Resend.
  • You will see a popup appear where you can paste and save your API key instantly.
Resend integration popup in chatResend integration popup in chat
This is ideal if you are already chatting with Rocket while building. No clicks, just action.
Method 2: From your project settings
  • Open any project.
  • Go to Integrations.
Integrations tabIntegrations tab
  • Scroll through the integrations list.
  • Click the Resend card.
Click Resend integration in Project settingsClick Resend integration in Project settings
When you connect Resend from Project Settings, Rocket will not automatically create email flows.After saving your API key, you must describe the email flow you want in chat for Rocket to implement it.
3

Save your Resend API key

  • In Rocket’s Resend integration screen, paste your API key into the textbox.
  • Click Save to complete setup.
Success check: You’ll see a green dot next to Resend in your integrations list.
Important Security Notice
Never paste your Resend API Key directly into Rocket chat.
Always use the secure integration flow or the API key input provided in settings to connect your account safely.
4

Update or remove your Resend API key

  • Click the Resend integration again.
  • Replace the existing key or click Disconnect to remove it.
Remove Resend API keyRemove Resend API key
Once connected, just describe your email flow in chat and Rocket will handle the rest.It instantly generates the logic, templates, and secure data hookups you need. No setup, no stress.
Want to route Supabase Auth emails (like sign-in and password reset) through Resend?
Configure your Supabase project’s SMTP settings with Resend to customize delivery and email branding.
See the official guide:
How to send with Supabase via Resend SMTP.
Resend also supports newsletters and marketing emails using Audiences and Broadcasts.
Design campaigns with built-in analytics and unsubscribe handling, all from your Resend dashboard.

You did it!

Resend is now connected to your Rocket project. You can securely send emails like onboarding messages, confirmations, or newsletters automatically.