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## API Updates and Announcement for August 31, 2023

**API**

* Resolved file errors in [Marketing](/developer/api-reference/rest/admin/content/marketing), [Currencies](/developer/api-reference/rest/admin/management/currencies), and [Orders V3](/developer/api-reference/rest/admin/management/order-operations).

* Added the `X-Correlation-Id` header to the group headless storefront requests. See the Correlating request section for details.

* Added documentation on maximum cache time for Scripts.

* Updated several platform engagement articles, including Best Practices, Making Requests, and About Our API.

**Announcement**

* We are implementing an internal migration to enhance our API’s performance for the following endpoints:

[GET v3/catalog/products/\{product_id}/variants/\{variant_id}](/developer/api-reference/rest/admin/catalog/product-variants)

* [GET v3/catalog/brands/\{brand_id}](/developer/api-reference/rest/admin/catalog/brands)

If you experience any unexpected API behavior on the following endpoints, please check the documentation to ensure all accurate query parameters and API usage.