{"uid":"cap_k80MJJ3r2bBqNrKyAi1lN","slug":"cortexcloud-text-to-speech-api-7fb26042","name":"CortexCloud Text-to-Speech API","description":"OpenAI-compatible AI and data API for agents. Pay per call in USDC on Base via x402 — no API keys, no subscriptions, no lock-in.","url":"https://api.cortexcloud.org/x402/v1/audio/speech","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"input":{"type":"string"},"model":{"type":"string"},"voice":{"type":"string"}}},"responseSchema":{"type":"object","format":"application/json","example":{}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_n0voolau55AVWctBpzmT8","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Converts text input into spoken audio using a specified voice model, billed per call in USDC via x402","exampleAgentPrompt":"Read this aloud using the 'alloy' voice: 'Welcome to our platform. We're glad you're here.' — synthesize it as speech using the tts-1 model.","exampleUseCases":[{"title":"Voiceover for product demo","prompt":"Turn this script into a spoken voiceover using the 'nova' voice and the tts-1 model: 'Our new product saves you hours every week with smart automation.'"},{"title":"Accessibility audio for article","prompt":"Convert this article summary into audio using the 'echo' voice so I can listen to it on the go: 'Scientists have discovered a new method for carbon capture that could reduce emissions significantly.'"},{"title":"Multilingual assistant response narration","prompt":"Synthesize this assistant reply as speech using the 'shimmer' voice and tts-1 model: 'Your order has been confirmed and will arrive by Thursday.'"}],"resultDescription":"Returns synthesized audio data representing the spoken version of the input text, generated by the specified voice model and voice character. The response format is application/json per the schema, though the content is expected to be audio or a reference to it.","failureModes":["Missing or empty 'input' text field returns an error","Invalid or unsupported 'voice' value may return a model error","Invalid 'model' name results in a bad request response","Payment not fulfilled via x402 results in 402 Payment Required","Network timeouts if audio generation takes too long","Empty response body if audio synthesis fails silently"],"whenToPreferThis":"Choose this endpoint when you need pay-per-call text-to-speech with no API key or subscription setup, especially in autonomous agent workflows that use x402 micropayments on Base in USDC. It is ideal when you want OpenAI-compatible TTS access without committing to a billing account, or when operating in a crypto-native payment environment.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:49:43.495Z","isFirstParty":false}