# utunumus studio – Text-to-Speech

> utunumus studio – Text-to-Speech is a paid API for AI agents from studio.utunumus.com, paid per call via x402, $0.012/call, status unknown (last checked 2026-09-15).

Converts a text prompt into spoken audio, billed per request via x402 micropayment on Base.

## Facts

- Endpoint: POST https://studio.utunumus.com/v1/audio.speech
- Price: $0.012/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/utunumus-studio-text-to-speech-bc7c1131
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__WFMZhKt2Z7GKa-ERYlK0

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability utunumus-studio-text-to-speech-bc7c1131 -d '<json body>'
```

Example prompt: Can you turn this paragraph into spoken audio: 'Welcome to our weekly product update. Here's what's new this week at Acme Corp.'

## When to prefer this

Choose this endpoint when your agent needs per-call, pay-as-you-go text-to-speech without a subscription, settled on-chain via x402 on Base. Ideal for agents that generate audio on demand without committing to a monthly TTS plan, or for workflows where micropayment auditability matters.

## Known failure modes

- Missing or empty prompt field returns a 400 validation error
- Insufficient USDC balance or failed x402 payment results in a 402 Payment Required response
- Prompt too long may exceed model or service limits, returning a 413 or 422 error
- Network or model backend unavailability returns a 503 error

## How this service works

x402-paid media utilities for agents: background removal, upscaling, text-to-speech, image generation. Paid per deliverable, settled on Base.

## Output

An audio file or audio data containing the synthesized speech of the provided text prompt, ready for playback or distribution.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "prompt"
 ],
 "properties": {
  "prompt": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/utunumus-studio-text-to-speech-bc7c1131/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from studio.utunumus.com](https://www.zero.xyz/host/studio.utunumus.com/llms.txt)