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Zero data retention (ZDR) is the default for every Prism inference request on every service tier. You do not need to enable a setting or enter a separate agreement.
Prism processes API content only for the time needed to complete and return a request. It is discarded after processing and is never used for model training.

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What ZDR covers

ZDR applies to the content sent to and returned from every Prism inference endpoint: Prism does not write this content to persistent storage, application logs, analytics systems, or backups. It is not used to train, fine-tune, evaluate, or otherwise improve models. This applies to Chat Completions, OpenAI Responses, Anthropic Messages, and token-count requests.

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What Prism retains

ZDR covers API inputs and outputs. It does not cover the non-content information needed to operate the service: Service metadata is designed not to contain the substance of API inputs or outputs. Prism retains non-content information only as described in the Privacy Policy.
If you voluntarily copy API content into a support request, that copy becomes part of the support communication and may be retained with the support record.

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Build stateless applications

Because Prism does not retain API content:
  • Keep conversation history and application state in your own system.
  • Resend the required context with each request.
  • Do not rely on Prism to retrieve or export past inputs or outputs.
  • Use store: false with the Responses API. Stored Responses and previous_response_id are not supported.
The API still returns token usage and request status in each response so your application can observe the current request without Prism storing its content.

Privacy Policy

Read the complete policy for API content, metadata, accounts, and billing.

Responses API

Learn how to use Prism’s stateless Responses-compatible endpoint.
Last modified on September 15, 2026