{"uid":"cap_uManzQuyr1K6QltBS2HlY","slug":"autumn-eight-text-to-speech-tts-endpoint-2780b310","name":"Autumn Eight Text-to-Speech (TTS) Endpoint","description":"Agent-payable inference. Chat, embeddings, rerank, transcription and speech.","url":"https://x402.autumn8.net/v1/audio/speech?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":null,"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","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":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_kp9JNJgYvT3zxv3SJMwFV","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":null,"unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Converts text input into spoken audio output, payable per-call via x402 micropayment protocol","exampleAgentPrompt":"Read out the following script in a natural voice and give me the audio file: 'Welcome to our platform. We're glad you're here. Let's get started.'","exampleUseCases":[{"title":"Automated podcast intro voiceover","prompt":"Generate spoken audio for this podcast intro script using a natural-sounding voice: 'Good morning and welcome to The Daily Briefing. Today we cover markets, tech, and global news.' I need an MP3 I can drop into my episode."},{"title":"Accessibility read-aloud for article","prompt":"Turn this article summary into audio so visually impaired users can listen to it: 'Scientists have discovered a new exoplanet in the habitable zone of a nearby star, raising hopes for future exploration.' Use a clear, neutral voice."},{"title":"Agent-generated voice confirmation message","prompt":"My AI workflow needs to produce a short spoken confirmation for users after they complete a purchase — say something like 'Your order has been placed successfully. Thank you for shopping with us.' Generate the audio clip now."}],"resultDescription":"Returns a synthesized audio file (e.g. MP3 or WAV) containing the spoken version of the input text, produced by an AI voice model and delivered as binary audio content","failureModes":["Payment not provided or insufficient USDC balance via x402 — returns 402 Payment Required","Text input too long for a single call — may return a 400 or truncation error","Unsupported voice or format parameter — returns 400 Bad Request","Service unavailability or inference backend error — returns 500 or 503","Malformed request body — returns 400 with validation details"],"whenToPreferThis":"Choose this endpoint when you need pay-per-call text-to-speech with no subscription commitment, especially in autonomous agent pipelines that use x402 micropayments (USDC). It is well-suited for workflows where spending is metered per inference call rather than billed monthly. Prefer it over subscription TTS APIs when operating agentic systems that need programmatic, per-request payment authorization without human-in-the-loop billing setup.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T18:31:58.565Z","isFirstParty":false,"canonicalSlug":"autumn-eight-text-to-speech-tts-endpoint-2780b310"}