CastReader Voice API

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Developer preview

What are you building?

Tell us how you want to use a private voice in your product. We review applications and follow up by email. No payment is needed to apply.

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We use these details to review and follow up on this request. This does not subscribe you to a newsletter. Data and permissions.

A small start, with clear limits.

Current access is for short English speech: up to 120 characters per task, queued generation, and MP3 or WAV output. It is a preview without a latency or uptime SLA.

After activation, you can create API keys, use your trial characters, and add credits when you need them. Your CastReader Pro subscription and API wallet are separate.

Need real-time speech, long passages or EU-region hosting? Include that in your project description so we can tell you whether the current service fits.

Review all current limits →

Already have access? Open the console.

CastReader· Voice API · Developer preview

Data & voice permissions API reference Product facts for AI tools Service status