Send emails with Supabase Edge Functions

Learn how to send your first email using Supabase Edge Functions.

Prerequisites

Before you start, you'll need:

A Resend API key
A verified domain

Make sure you have the latest version of the Supabase CLI installed.

Guide

Create Supabase function
Create a new function locally:
Bash
```
supabase functions new resend
```

Edit the handler function

Paste the following code into the index.ts file:

index.ts

const RESEND_API_KEY = Deno.env.get('RESEND_API_KEY');

const handler = async (_request: Request): Promise<Response> => {
  const res = await fetch('https://api.resend.com/emails', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'Authorization': `Bearer ${RESEND_API_KEY}`,
    },
    body: JSON.stringify({
      from: 'Acme <onboarding@resend.dev>',
      to: ['delivered@resend.dev'],
      subject: 'hello world',
      html: '<strong>it works!</strong>',
    }),
  });

  const data = await res.json();

  return new Response(JSON.stringify(data), {
    status: 200,
    headers: {
      'Content-Type': 'application/json',
    },
  });
};

Deno.serve(handler);

Deploy and send email
Run function locally:
Bash
```
supabase functions start
supabase functions serve resend --no-verify-jwt
```
Deploy function to Supabase:
Bash
```
supabase functions deploy resend
```
Open the endpoint URL to send an email:

Examples

Supabase Edge Functions Example

See the full source code.

Search documentation

Get started

Learn

Resources