{"uid":"cap_Th9BU4TcJLU0eZGL_jOSo","slug":"heygen-speech-via-openrouter-af482786","name":"HeyGen Speech (via OpenRouter)","description":"Generate speech/audio bytes (one-shot charge; character or bounded audio pricing; models, prices and voices at GET /v1/audio/models)","url":"https://heygen.mpp.tempo.xyz/v1/audio/speech?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["tts","speech","avatar","openrouter","ai"],"displayCostAmount":"unknown","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"unknown_unparsed","priceSource":"registry","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"unknown","summary":"price unknown","primary":{"kind":"unknown","protocol":"mpp","network":"tempo","amountUsd":null,"per":"call","confidence":"unknown"},"accepted":[{"kind":"unknown","protocol":"mpp","network":"tempo","amountUsd":null,"per":"call","confidence":"unknown"}]},"paymentMethods":[{"uid":"pm_odeYKlTNIPy-4KGvX1mab","protocol":"mpp","methodType":"crypto","chain":"tempo","mode":"charge","costAmount":"unknown","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":"HeyGen","brandSlug":"heygen-mpp","brandBaseUrl":"https://www.heygen.com","brandDocsUrl":"https://openrouter.ai","whatItDoes":"Converts text to speech audio bytes using HeyGen's TTS models, billed per character or audio unit via a one-shot USDC payment.","exampleAgentPrompt":"Generate speech audio from this script: 'Welcome to our product demo. Today we'll show you how easy it is to get started.' — use a professional male voice and return the audio bytes.","exampleUseCases":[{"title":"Podcast narration from article","prompt":"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."},{"title":"E-learning voiceover generation","prompt":"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."},{"title":"Multilingual product demo audio","prompt":"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."}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-03T12:31:44.967Z","isFirstParty":false,"canonicalSlug":"heygen-speech-via-openrouter-af482786"}