Resend

Set up API access for Resend, an email API for developers. Send transactional and marketing emails with a simple REST API.

⏱ 3 minutes email messaging resend.com

getapi resend

Prerequisites

Variable	Description	Sensitive
`RESEND_API_KEY`	API key for authenticating requests	Secret

1 Info

We'll get you a Resend API key. Resend's free tier includes 3,000 emails per month and 100 emails per day.
2 Open URL

Opening the Resend API keys page. Sign in if prompted.
https://resend.com/api-keys
3 Info

Click 'Create API Key'. Give it a descriptive name (e.g. your project name). Choose 'Full access' for permissions unless you only need sending.
4 Input

Copy the API key and paste it here (starts with re_):

→ RESEND_API_KEY

Starts with re_. At least 20 characters
5 Validate

Checking your API key works...

API key verified. You're all set.

Couldn't verify the API key. Make sure you copied it correctly.

API keys are only shown once when created. If you lose it, you'll need to create a new one.
Free tier includes 3,000 emails/month and 100 emails/day.
You must verify a domain before sending from custom email addresses. You can use the onboarding@resend.dev sender for testing.
Resend uses API keys prefixed with 're_'. Don't confuse them with other services' keys.