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HeyGen Speech (via OpenRouter)
ttsspeechavataropenrouterai
HeyGen Speech (via OpenRouter) is a paid API for AI agents from HeyGen at heygen.mpp.tempo.xyz, paid per call via MPP, price unknown, status unknown (last checked 2026-11-03).
Converts text to speech audio bytes using HeyGen's TTS models, billed per character or audio unit via a one-shot USDC payment.
Price / call—
Success—
StatusUnknown
How this service works
Generate speech/audio bytes (one-shot charge; character or bounded audio pricing; models, prices and voices at GET /v1/audio/models)
Output
Returns raw audio bytes representing the synthesized speech, ready to be saved or streamed as an audio file. The response contains the generated audio in the requested format, produced by the selected HeyGen TTS model and voice.
Example use cases
Podcast narration from article
“Take this blog post text and turn it into a natural-sounding spoken audio file using a warm, conversational voice so I can publish it as a podcast episode.”
E-learning voiceover generation
“Convert this lesson script into speech audio using a clear, neutral professional voice — it's for an online course module and needs to sound authoritative but friendly.”
Multilingual product demo audio
“Generate audio from this product announcement script using a HeyGen voice that sounds natural and engaging — I need the audio bytes back so I can embed them in our app.”
Technical details
Endpoint
POSThttps://heygen.mpp.tempo.xyz/v1/audio/speech?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need high-quality AI text-to-speech synthesis via HeyGen's voice models with pay-per-use USDC billing and no subscription. Ideal for agents that need to generate audio on demand from arbitrary text inputs, especially when combined with HeyGen's video generation pipeline or when needing access to HeyGen-specific voices not available on generic TTS providers.
Side effects
- Invalid or unsupported voice ID returns an error
- Unsupported model name causes rejection
- Text input too long exceeds character or audio pricing limits
- Insufficient USDC balance for one-shot payment fails the request
- Malformed request body returns validation error
- Unsupported audio format parameter causes error
Tags
ttsspeechavataropenrouterai
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