For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.

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Overview Text to Speech API Reference Changelog

Overview Text to Speech API Reference Changelog

Changelog

API: Streaming format fallback

Streaming endpoint now defaults to audio/mpeg when the Accept header is not provided or is invalid.

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API: Voices avatar and gender support

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