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Prerequisites

To get the most out of this guide, you’ll need to:

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

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1. Create Supabase function

Create a new function locally:

supabase functions new resend

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2. Edit the handler function

Paste the following code into the index.ts file:

index.ts
import { serve } from "https://deno.land/std@0.168.0/http/server.ts";

const RESEND_API_KEY = 're_123456789';

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',
        },
    });
};

serve(handler);

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3. Deploy and send email

Run function locally:

supabase functions start
supabase functions serve resend --no-verify-jwt

Deploy function to Supabase:

supabase functions deploy resend

Open the endpoint URL to send an email:

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4. Try it yourself

Supabase Edge Functions Example

See the full source code.

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