---
title: "event_id"
url: https://develop.sentry.dev/sdk/foundations/transport/event-payloads/properties/event_id/
---

# undefined

* `event_id`

  *Required*. Hexadecimal string representing a uuid4 value. The length is exactly 32characters. Dashes are not allowed. Has to be lowercase.

```json
{
  "event_id": "fc6d8c0c43fc4630ad850ee518f1b9d0"
}
```