---
title: MarketplaceWebhookUpdateRequest.Data.Attributes
framework: appstoreconnectapi
role: symbol
role_heading: Object
path: appstoreconnectapi/marketplacewebhookupdaterequest/data-data.dictionary/attributes-data.dictionary
---

# MarketplaceWebhookUpdateRequest.Data.Attributes

Attributes that describe a marketplace webhook resource.

## Declaration

```data
object MarketplaceWebhookUpdateRequest.Data.Attributes
```

## Properties

endpointUrl: secret: An arbitrary string. Alternative marketplaces use this secret string to verify the incoming requests from Apple about changes to apps. For more information about webhook-style validation, see Github’s Validating webhook deliveries. For more information about implementing Hash-based Message Authentication Code (HMAC) security in your notifications webhook, see Processing alternative app marketplace notifications.