curl -X PATCH 'https://api.resend.com/inboxes/inbox-id' \
  -H "Authorization: Bearer $RESEND_API_KEY" \
  -H 'User-Agent: my-app/1.0' \
  -H 'Content-Type: application/json' \
  -d '{
  "name": "Customer Support",
  "from_name": "Ada from Support"
}'

# PATCH /inboxes/{inbox_id} (Resend API)
Base URL: https://api.resend.com
Auth: Authorization: Bearer <RESEND_API_KEY>
Last verified: 2026-10-20

> Update an existing inbox by ID or email address

## Critical Gotchas
* All requests must include a `User-Agent` header (e.g. `User-Agent: my-app/1.0`) or the API returns HTTP 403.

## cURL
curl -X PATCH 'https://api.resend.com/inboxes/inbox-id' \
  -H "Authorization: Bearer $RESEND_API_KEY" \
  -H 'User-Agent: my-app/1.0' \
  -H 'Content-Type: application/json' \
  -d '{"name":"Customer Support","from_name":"Ada from Support"}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| inbox_id | path | string | Yes | The Inbox ID or the inbox email address, such as `support... |
| name | body | string | Yes | New internal name for the inbox. Recipients do not see it... |
| from_name | body | string | No | The name recipients see when mail is sent from this inbox... |

## Response (200 OK)
{"object":"inbox","id":"b3e2b2b6-3f0e-4c8e-9ad3-2f43a1e2c7f1"}

---
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PATCH

PATCH /inboxes/{inbox_id} — Resend API

Resend API

Update an existing inbox by ID or email address

Base URL: https://api.resend.com
Auth: Authorization: Bearer <RESEND_API_KEY>
Last verified: 2026-10-20 · upstream hash matched

Actions Try in browser→

Agents: curl -H "Accept: text/markdown" this URL
→ 223 tokens · Vary: Accept

Critical gotchas

All requests must include a User-Agent header (e.g. User-Agent: my-app/1.0) or the API returns HTTP 403.

cURL

curl -X PATCH 'https://api.resend.com/inboxes/inbox-id' \  -H "Authorization: Bearer $RESEND_API_KEY" \  -H 'User-Agent: my-app/1.0' \  -H 'Content-Type: application/json' \  -d '{  "name": "Customer Support",  "from_name": "Ada from Support"}'

Parameters

Name	In	Type	Required	Description
inbox_id	path	string	Yes	The Inbox ID or the inbox email address, such as `[email protected]`. A value that contains `@` must be a valid email address, and any other value must be a UUID, or the request returns a 422. The address match is case-insensitive and never falls back to the inbox `name`. An address that matches no inbox returns a 404.
name	body	string	Yes	New internal name for the inbox. Recipients do not see it. Between 1 and 64 characters after trimming.
from_name	body	string	No	The name recipients see when mail is sent from this inbox. A plain name, not a `Name <email>` address. Max 78 characters. It cannot contain a colon, `<`, `>`, line breaks, or other control characters. An email address inside the name must be on a domain the team has verified for sending. An empty string removes it.

Response 200 OK

{
  "object": "inbox",
  "id": "b3e2b2b6-3f0e-4c8e-9ad3-2f43a1e2c7f1"
}

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