Text-to-speech
POST https://agent402.tools/v1/audio/speech
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.
How to buy
This endpoint takes pay-per-call payments over x402. Call it once without paying to see its live price; any x402 client then pays and retries automatically.
curl -i -X POST "https://agent402.tools/v1/audio/speech"
# HTTP/1.1 402 Payment Required: price, asset and payTo are in the responseRecent checks
| Checked (UTC) | Result | Status | Time | Live price |
|---|---|---|---|---|
| 2026-10-11 09:30 | Valid 402 | 402 | 861 ms | $0.06 |
| 2026-10-11 05:00 | Valid 402 | 402 | 859 ms | $0.06 |
| 2026-10-11 00:45 | Valid 402 | 402 | 943 ms | $0.06 |
| 2026-10-10 20:15 | Valid 402 | 402 | 572 ms | $0.06 |
Receipts
No test purchases yet. Graded test purchases are next on our list; until then every number here comes from unpaid checks.
What a check proves