Page History

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April 15, 2026

Updated Validations for CPC Bidding Strategy on Video Line Items

What is it? Starting April 28, 2026, a new validation will prevent CPC from being selected as a bidding strategy for video line items. Any attempt to add CPC as a bidding strategy to a line item via a POST/PATCH/PUT call will result in a 400 error response with an applicable error message.

How am I affected? Double check that any video line items do not have a CPC bidding strategy selected. After the 28th, video line items with CPC bidding strategies will be blocked, so you will not be able to update these line items.

The impacted endpoint is listed below:

• /rest/v2/line-items

Resource(s): Line Items

April 6, 2026

Updated Validations for Externally Hosted Native and Banner Image Creatives

What is it? New validations ensure that all creative URLs that are added to a 2.0 creatives POST endpoint payload for native and banner image creatives are not externally hosted. Externally hosted URLs are unsupported and may cause unintended consequences across other systems.

Similar validations for Video VAST Inline, Audio Inline, and Banner HTML5 creatives will be implemented at a later date.

How am I affected? Existing native and banner image creatives will continue to serve. Double check that all creative URLs are not hosted externally and update any URLs that violate this condition. This will ensure that any future changes to these creatives will not be blocked.

Any attempts to update and save creatives which do break this validation will be presented with an error, and will be prevented from saving.

The impacted endpoint is listed below:

• /rest/v2/creatives

Resource(s): Creatives

March 31, 2026

New Activity Log v 2.0 Endpoint Now Available

What is it? The 2.0 version of the Activity Log endpoint is now available for use. This release allows for customers to see activity logs across all objects, and export them for use.

How am I affected? Customers may now start using the Activity Log 2.0 API endpoint. The deprecation date for the 0.5 Activity Log endpoint will be announced at a future date.

The new endpoint is listed below:

• /rest/v2/activity-logs

Resource(s): Activity logs

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 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

What is it? The 2.0 versions of the models and model versions endpoints are now available for use. This release simplifies the API JSON structure and adds new PATCH methods for partial updates.

How am I affected? Customers may now start using the 2.0 APIs for models and model versions. The deprecation date for the 0.5 models and model versions APIs will be announced at a future date.

The new endpoints are listed below: 

• /models/
• /models/{id}
• /models/{id}/versions
• /models/{id}/reset-current-version
• /models/versions
• /models/versions/{id}

Resources: Models

March 5, 2026

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

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