Update Draft

Omitted fields are left unchanged. Send at least one of to, cc, bcc, subject, text, or html. The merged draft must still contain at least one non-empty field. Combined recipients cannot exceed 50.

The Inbox ID.

The Draft ID.

• to (string | string[] | null) — Recipients. Pass null to clear.

• cc (string | string[] | null) — CC recipients. Pass null or [] to clear.

• bcc (string | string[] | null) — BCC recipients. Pass null or [] to clear.

• subject (string | null) — The subject. Pass null to clear. Max 2000 characters.

• html (string | null) — The HTML body. Pass null to clear.

• text (string | null) — The plain-text body. Pass null to clear.

• object (string) — Always inbox_draft.

• id (string) — The ID of the draft.

• type (string) — standalone for a new conversation, or reply.

• to (string[] | null) — Recipients.

• cc (string[]) — CC recipients.

• bcc (string[]) — BCC recipients.

• subject (string | null) — The subject.

• html (string | null) — The HTML body.

• text (string | null) — The plain-text body.

• thread_id (string | null) — The Thread ID when this draft is a reply. null otherwise.

• reply_to_email_id (string | null) — The Email ID being replied to. null otherwise.

• email_id (string | null) — The queued outbound email after send. null until then.

• created_at (string) — ISO 8601 timestamp when the draft was created.

• updated_at (string) — ISO 8601 timestamp when the draft was last saved.

import { Resend } from 'resend';

const resend = new Resend('re_xxxxxxxxx');

const { data, error } = await resend.inboxes.drafts.update({
  inboxId: 'b3e2b2b6-3f0e-4c8e-9ad3-2f43a1e2c7f1',
  draftId: 'c3a1e8b4-2d5f-4a7c-9e10-6b8d7f5a4c32',
  subject: 'Refund issued for order 1041',
});

curl -X PATCH 'https://api.resend.com/inboxes/b3e2b2b6-3f0e-4c8e-9ad3-2f43a1e2c7f1/drafts/c3a1e8b4-2d5f-4a7c-9e10-6b8d7f5a4c32' \
     -H 'Authorization: Bearer re_xxxxxxxxx' \
     -H 'Content-Type: application/json' \
     -d $'{
  "subject": "Refund issued for order 1041"
}'

resend inboxes drafts update \
  --inbox_id b3e2b2b6-3f0e-4c8e-9ad3-2f43a1e2c7f1 \
  --draft_id c3a1e8b4-2d5f-4a7c-9e10-6b8d7f5a4c32 \
  --subject "Refund issued for order 1041"

{
  "object": "inbox_draft",
  "id": "c3a1e8b4-2d5f-4a7c-9e10-6b8d7f5a4c32",
  "type": "standalone",
  "to": ["ada@example.org"],
  "cc": [],
  "bcc": [],
  "subject": "Refund issued for order 1041",
  "html": "<p>Refund issued for order 1041.</p>",
  "text": "Refund issued for order 1041.",
  "thread_id": null,
  "reply_to_email_id": null,
  "email_id": null,
  "created_at": "2026-08-05T14:12:04.110Z",
  "updated_at": "2026-08-05T14:13:22.004Z"
}