import { Resend } from 'resend';

const resend = new Resend('re_xxxxxxxxx');

const { data, error } = await resend.inboxes.threads.emails.reply({
  inboxId: 'b3e2b2b6-3f0e-4c8e-9ad3-2f43a1e2c7f1',
  threadId: '4d8e2a1c-9b3f-4c6d-8a21-3e5f7c9c0d12',
  emailId: '5b1a9f47-2c8d-4e6f-9a03-1d2e3f4a5b60',
  html: '<p>Refund issued for order 1041.</p>',
  text: 'Refund issued for order 1041.',
});

curl -X POST 'https://api.resend.com/inboxes/b3e2b2b6-3f0e-4c8e-9ad3-2f43a1e2c7f1/threads/4d8e2a1c-9b3f-4c6d-8a21-3e5f7c9c0d12/emails/5b1a9f47-2c8d-4e6f-9a03-1d2e3f4a5b60/reply' \
     -H 'Authorization: Bearer re_xxxxxxxxx' \
     -H 'Content-Type: application/json' \
     -d $'{
  "html": "<p>Refund issued for order 1041.</p>",
  "text": "Refund issued for order 1041."
}'

resend inboxes threads emails reply \
  --inbox_id b3e2b2b6-3f0e-4c8e-9ad3-2f43a1e2c7f1 \
  --thread_id 4d8e2a1c-9b3f-4c6d-8a21-3e5f7c9c0d12 \
  --email_id 5b1a9f47-2c8d-4e6f-9a03-1d2e3f4a5b60 \
  --html "<p>Refund issued for order 1041.</p>" \
  --text "Refund issued for order 1041."

{
  "id": "6a0c8e58-3d9e-4f7a-8b14-2e3f4a5b6c71",
  "email_id": "6a0c8e58-3d9e-4f7a-8b14-2e3f4a5b6c71",
  "direction": "outbound",
  "from": "support@example.com",
  "to": ["Ada Lovelace <ada@example.org>"],
  "cc": [],
  "bcc": [],
  "reply_to": [],
  "subject": "Re: Refund for order 1041",
  "message_id": null,
  "html": "<p>Refund issued for order 1041.</p>",
  "text": "Refund issued for order 1041.",
  "attachments": [],
  "read": true,
  "received_at": "2026-08-05T14:12:04.110Z"
}