Changelog

Text you send for synthesis is now screened before Speechify produces audio from it. A request whose content is not permitted returns 400 content_policy_violation with no audio, and is not billed. This applies to /v1/audio/speech, /v1/audio/stream, /v1/audio/stream/with-timestamps and /v1/audio/dialogue, and to an agent’s prompt and first_message when you create or update one.

Most published work is unaffected - fiction, journalism, true crime and court reporting routinely describe or quote violence, and depicting that material is treated differently from producing it.

One thing worth handling in your client: content_policy_violation is a persistent error, so retrying the same text will be refused again. On the streaming endpoints the decision is always made before the first audio byte, so a 200 means the request passed and a refusal is always a JSON 400, never a truncated or empty audio file. See Content Policy.