"After April 1, 2026, you must use the Data Manager API for this functionality. Effective April 1, 2026, Customer Match data uploads using the Google Ads API with your developer token will fail. If you want to upload data to Customer Match lists, you should instead use the Data Manager API to manage and upload data to Customer Match lists."
"The Data Manager API provides a unified data ingestion API for sending data across all Google platforms, with enhanced security protocols compared to the Google Ads API. Developers who aren't actively uploading data to Customer Match lists in the Ads API will receive an error when attempting to upload data to Customer Match lists."
"The Data Manager API provides a better developer experience and has new exclusive features, such as confidential matching and encryption. Developers can use the Data Manager API for Customer Match list management and uploads."
Google announced a significant change to Customer Match functionality in its APIs. Starting April 1, 2026, Customer Match data uploads through the Google Ads API will no longer function and must be performed using the Data Manager API instead. Developers who have not uploaded Customer Match data in the last 180 days will receive errors when attempting uploads via the Google Ads API. The Data Manager API offers unified data ingestion across Google platforms with enhanced security protocols, confidential matching, and encryption capabilities. Non-Customer Match operations will continue using the Google Ads API. Google recommends developers review upgrade guides and transition their implementations to the new Data Manager API before the deadline.
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