# Send emails with Supabase Edge Functions

## Prerequisites

Before you start, you'll need:

- A Resend [API key](/guides/get-started-create-an-api-key)
- A [verified domain](/guides/get-started-add-a-domain)

Make sure you have the latest version of the [Supabase CLI](https://supabase.com/docs/guides/cli#installation) installed.

## Guide

::::steps
:::step{title="Create Supabase function"}
Create a new function locally:

```bash theme={"theme":{"light":"github-light","dark":"vesper"}}
supabase functions new resend
```
:::

:::step{title="Edit the handler function"}
Paste the following code into the `index.ts` file:

```ts index.ts theme={"theme":{"light":"github-light","dark":"vesper"}}
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);
```
:::

:::step{title="Deploy and send email"}
Run function locally:

```bash theme={"theme":{"light":"github-light","dark":"vesper"}}
supabase functions start
supabase functions serve resend --no-verify-jwt
```

Deploy function to Supabase:

```bash theme={"theme":{"light":"github-light","dark":"vesper"}}
supabase functions deploy resend
```

Open the endpoint URL to send an email:

![Supabase Edge Functions - Deploy Function](../img/site-assets/mintcdn.com/resend/OWNnQaVDyqcGyhhN/images/supabase-edge-functions-deploy-function-1nqi4c4.png)
:::
::::

## Examples

:::card{title="Supabase Edge Functions Example" href="https://github.com/resend/resend-supabase-edge-functions-example" icon="arrow-up-right-from-square"}
See the full source code.
:::

## Related pages

- [Send emails with Vercel Functions](./get-started-send-with-vercel-functions.md)
- [Send emails with Cloudflare Workers](./get-started-send-with-cloudflare-workers.md)
- [Send emails with Deno Deploy](./get-started-send-with-deno-deploy.md)
- [Send emails with AWS Lambda](./get-started-send-with-aws-lambda.md)

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