$ cd ~/my-project
$ supabase functions new resend
Created new Function at supabase/functions/resend

.
├── .vscode
│   ├── extensions.json
│   └── settings.json
└── resend
    └── index.ts

import { serve } from 'https://deno.land/[email protected]/http/server.ts';
 
// Supabaseにセットしたシークレットを使用する
// シークレットの設定方法は後述
const RESEND_API_KEY = Deno.env.get('RESEND_API_KEY');
 
const handler = async (_request: Request): Promise<Response> => {
  // _requestから送信先メールアドレスと送信内容を取得する
  const _requestBody = await _request.json();
 
  // このSupabase Edge Functionでは以下のjsonを受け取ることを想定している
  // {
  // body: {
  //       to: string,
  //       message: string,
  //       subject: string,
  //   },
  // }
 
  const res = await fetch('https://api.resend.com/emails', {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      Authorization: `Bearer ${RESEND_API_KEY}`,
    },
    body: JSON.stringify({
      from: 'resend edge function <[email protected]>',
      to: [_requestBody.to],
      subject: _requestBody.subject,
      html: `<h1>以下のお問い合わせを受け付けました。</h1></br>${_requestBody.message}`,
    }),
  });
 
  const data = await res.json();
 
  return new Response(JSON.stringify(data), {
    status: 200,
    headers: {
      'Content-Type': 'application/json',
    },
  });
};
 
serve(handler);

{
  "body": {
    "to": "送信先メールアドレス",
    "message": "送信内容",
    "subject": "件名"
  }
}

$ supabase secrets set RESEND_API_KEY=re_123456789

$ supabase secrets set 環境変数名=値

$ supabase secrets set RESEND_API_KEY=re_123456789
Finished supabase secrets set.

$ supabase secrets list
 
 
         NAME      │                              DIGEST
  ─────────────────┼───────────────────────────────────────────────────────────────────
    RESEND_API_KEY │ 2c91d2a82x1pa8bba6bc4b438db52811486794916fb1ea14da7d051dd28172d0

$ supabase functions deploy resend --no-verify-jwt

$ supabase functions deploy resend --no-verify-jwt
Version 1.30.3 is already installed
Bundling resend
Deploying resend (script size: 21.26kB)
Deployed Function resend on project xxxxxxxxxx
You can inspect your deployment in the Dashboard: https://supabase.com/dashboard/project/xxxxxxxxxx/functions/resend/details

$ curl -X POST 'https://xxxxxxxxxxxxxxx.supabase.co/functions/v1/resend' \
  -d $'{
    "to": "[email protected]",
    "subject": "Hello World from Supabase Edge Function",
    "message": "メール送信テスト"
  }'

$ curl -X POST 'https://xxxxxxxxxxxxxxx.supabase.co/functions/v1/resend' \
  -d $'{
    "to": "[email protected]",
    "subject": "Hello World from Supabase Edge Function",
    "message": "メール送信テスト"
  }'
  {"id":"3b00111a-2918-9312-kj3e-888cc3c3729f"}%

$ curl -X POST 'https://xxxxxxxxxxxxxxx.supabase.co/functions/v1/resend' \
  -d $'{
    "to": "[email protected]",
    "subject": "Hello World from Supabase Edge Function",
    "message": "メール送信テスト"
  }'
{"statusCode":403,"message":"The example.com domain is not verified. Please, add and verify your domain on https://resend.com/domains","name":"validation_error"}%

$ supabase functions deploy resend

$ curl -X POST 'https://xxxxxxxxxxxxxxx.supabase.co/functions/v1/resend' \
  -H 'Authorization: Bearer eyJhb**********************' \
  -H 'Content-Type: application/json' \
  -d $'{
    "to": "[email protected]",
    "subject": "Hello World from Supabase Edge Function with Auth",
    "message": "認証メール送信テスト"
  }'