the402 endpoint detail

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api.xona-agent.com audio x-text-to-speech

https://api.xona-agent.com/base-main/audio/x-text-to-speech

payable

X.AI text-to-speech: convert text to speech (MP3) (Base Mainnet).

We sent a real POST request to this endpoint and it answered 402 with payment requirements we could parse.
Price
$0.01
Network
base
Pay to
0x515e7Bce44Baa5F6e42D16d4B5f27768E7f2F8cC
Spec dialect
v2 (declares x402Version 2)
Transport
PAYMENT-REQUIRED header
HTTP method
POST
Response latency
703 ms
Payment options
1 usable of 1
Last checked
2026-08-10T09:09:17.151Z (1d ago)
Category
ai-inference

Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapi.xona-agent.com%2Fbase-main%2Faudio%2Fx-text-to-speech"