{"slug":"agent402-tools-v1-audio-speech-a65fc6","title":"OpenAI-compatible text-to-speech over x402","host":"agent402.tools","method":"POST","resource":"https://agent402.tools/v1/audio/speech","category":"image","description":"OpenAI-compatible text-to-speech over x402 - point any OpenAI SDK's audio.speech.create() at base_url https://agent402.tools/v1 and pay $0.06 per call in USDC, no API key, no signup. Served by Voxtral Mini TTS behind a five-model failover chain (xAI Grok Voice, Kokoro, MAI-Voice-2 Flash, MAI-Voice-2","price_listed":0.06,"price_asked":0.06,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":917,"reported_calls_30d":49,"reported_payers_30d":1,"networks":["algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=","eip155:10","eip155:1329","eip155:137","eip155:143","eip155:42161","eip155:42220","eip155:43114","eip155:4663","eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","stellar:pubnet"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"input":"Agent402 serves fourteen hundred tools, paid per call.","voice":"alloy"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"input":{"description":"Text to speak (up to 2,000 chars)","type":"string"},"model":{"description":"Optional - pin a chain model (e.g. mistralai/voxtral-mini-tts-2603); the rest stay as fallbacks","type":"string"},"response_format":{"description":"\"mp3\" (default) or \"pcm\"","type":"string"},"speed":{"description":"Optional 0.25–4 playback speed (providers that don't support it ignore it)","type":"number"},"voice":{"description":"OpenAI voice name - alloy (default), ash, ballad, coral, echo, fable, onyx, nova, sage, shimmer, verse - or a native voice id from GET /v1/models (e.g. en_paul_cheerful)","type":"string"},"zdr":{"description":"Optional - true routes only to zero-data-retention providers","type":"boolean"}},"required":["input"]},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"type":"string"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.06,"price_match":true,"latency_ms":917,"error":null}],"description_full":"OpenAI-compatible text-to-speech over x402 - point any OpenAI SDK's audio.speech.create() at base_url https://agent402.tools/v1 and pay $0.06 per call in USDC, no API key, no signup. Served by Voxtral Mini TTS behind a five-model failover chain (xAI Grok Voice, Kokoro, MAI-Voice-2 Flash, MAI-Voice-2), every link proven by a real paid canary - a provider outage never becomes your failure. Up to 2,000 chars in, raw mp3 (default) or pcm bytes out - the same wire shape as OpenAI's endpoint.","last_updated":"2026-09-24T16:03:18.96Z","schemes":["exact","upto"]}