curl -X POST 'https://api.resend.com/inboxes' \
  -H "Authorization: Bearer $RESEND_API_KEY" \
  -H 'User-Agent: my-app/1.0' \
  -H 'Content-Type: application/json' \
  -d '{
  "email_address": "support@acme.com",
  "name": "Customer Support",
  "from_name": "Ada from Support",
  "forwarding": false
}'

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

> Create an inbox

## 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 POST 'https://api.resend.com/inboxes' \
  -H "Authorization: Bearer $RESEND_API_KEY" \
  -H 'User-Agent: my-app/1.0' \
  -H 'Content-Type: application/json' \
  -d '{"email_address":"support@acme.com","name":"Customer Support"}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| email_address | body | string | Yes | The inbox email address on one of you... |
| name | body | string | No | Internal name for the inbox. Recipien... |
| from_name | body | string | No | The name recipients see when mail is... |
Other params: forwarding

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

---
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POST

POST /inboxes — Resend API

Resend API

Create an inbox

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
→ 201 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 POST 'https://api.resend.com/inboxes' \  -H "Authorization: Bearer $RESEND_API_KEY" \  -H 'User-Agent: my-app/1.0' \  -H 'Content-Type: application/json' \  -d '{  "email_address": "[email protected]",  "name": "Customer Support",  "from_name": "Ada from Support",  "forwarding": false}'

Parameters

Name	In	Type	Required	Description
email_address	body	string	Yes	The inbox email address on one of your domains. The API trims and lowercases it. The part before the `@` is at most 64 characters and contains only letters, numbers, and `. _ % -`. A `+` returns a 422. It cannot start or end with a dot or contain two dots in a row.
name	body	string	No	Internal name for the inbox. Recipients do not see it. Max 64 characters. Defaults to `email_address`.
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 leaves it unset.
forwarding	body	boolean	No	When `true`, Resend provisions a receiving address so you can receive mail without adding an MX record. The address is returned in `receiving_address`.

Response 200 OK

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

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