Is the Batches API eligible for Zero Data Retention? — No — batch processing requires 29-day retention for async storage, so it's not ZDR-eligible

Zero Data Retention (ZDR) is a feature for certain API endpoints where Anthropic does not store any request or response data after processing completes. The Batches API, by its nature as an asynchronous system, requires temporary storage of batch requests and their results for up to 29 days. This retention window allows customers to retrieve results days after submission and handles error retries post-processing.

Therefore, the Batches API is not ZDR-eligible. If your compliance or security requirements mandate zero data retention, you cannot use the Batches API and should instead use standard Messages API calls, which offer ZDR as an optional configuration.