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CortexCloud Text-to-Speech API
x402
CortexCloud Text-to-Speech API is a paid API for AI agents from api.cortexcloud.org, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-15).
Converts text input into spoken audio using a specified voice model, billed per call in USDC via x402
Price / call$0.02
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Voiceover for product demo
“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.'”
Accessibility audio for article
“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.'”
Multilingual assistant response narration
“Synthesize this assistant reply as speech using the 'shimmer' voice and tts-1 model: 'Your order has been confirmed and will arrive by Thursday.'”
Technical details
Endpoint
GEThttps://api.cortexcloud.org/x402/v1/audio/speechWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | string | |
| model | string | |
| voice | string |
Output
Schema · Response
{
"type": "object",
"format": "application/json",
"example": {}
}Tags
x402
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