curl -X PATCH 'https://api.resend.com/events/example-identifier' \
  -H "Authorization: Bearer $RESEND_API_KEY" \
  -H 'User-Agent: my-app/1.0' \
  -H 'Content-Type: application/json' \
  -d '{
  "schema": {}
}'

# PATCH /events/{identifier} (Resend API)
Base URL: https://api.resend.com
Auth: Authorization: Bearer <RESEND_API_KEY>
Last verified: 2026-09-03

> Update an event

## Critical Gotchas
* All requests must include a `User-Agent` header (e.g. `User-Agent: my-app/1.0`) or the API returns HTTP 403.
* The `to` field is an array of strings, even when sending to a single recipient.

## cURL
curl -X PATCH 'https://api.resend.com/events/example-identifier' \
  -H "Authorization: Bearer $RESEND_API_KEY" \
  -H 'User-Agent: my-app/1.0' \
  -H 'Content-Type: application/json' \
  -d '{"schema":{}}'

## Parameters
| Name | In | Type | Required | Description |
| :--- | :--- | :--- | :--- | :--- |
| identifier | path | string | Yes | The event ID (UUID) or event name. |
| schema | body | object | Yes | A flat key/type map defining the event payload schema. Se... |

## Response (200 OK)
{"object":"event","id":"00000000-0000-4000-8000-000000000000"}

---
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PATCH

/events/{identifier}

Resend API

Update an event

Base URL: https://api.resend.com
Auth: Authorization: Bearer <RESEND_API_KEY>
Last verified: 2026-09-03 · upstream hash matched

Actions

Agents: curl -H "Accept: text/markdown" this URL
→ 198 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.

The to field is an array of strings, even when sending to a single recipient.

cURL

curl -X PATCH 'https://api.resend.com/events/example-identifier' \  -H "Authorization: Bearer $RESEND_API_KEY" \  -H 'User-Agent: my-app/1.0' \  -H 'Content-Type: application/json' \  -d '{  "schema": {}}'

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Parameters

Name	In	Type	Required	Description
identifier	path	string	Yes	The event ID (UUID) or event name.
schema	body	object	Yes	A flat key/type map defining the event payload schema. Set to `null` to clear the schema. Supported types are `string`, `number`, `boolean`, and `date`.

Response 200 OK

{
  "object": "event",
  "id": "00000000-0000-4000-8000-000000000000"
}