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March 16, 2026

Release Update to Bulk Create or Update Creative Associations Endpoint Response Body

What is it? The update to the bulk create or update creative associations PUT endpoint, originally announced on March 5, 2026, has been delayed to March 17, 2026.

This update will maintain parity with existing responses for the associated GET and POST endpoints. The following changes will be made:

  • The weighting field will be renamed to weight.
  • The line_item_id field will now be added in the response.

How am I affected? Customers who rely on response body fields for validations or processing should confirm that they are not impacted by these changes ahead of March 17th.

The impacted endpoint is listed below:

  • /line-items/{line_item_id}/creatives

Resource(s): Bulk create or update creative associations

March 11, 2026

Models 2.0 APIs Now Available

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