# Stability AI Audio-to-Audio via Locus x402

> Stability AI Audio-to-Audio via Locus x402 is a paid API for AI agents from stability-ai.x402.paywithlocus.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Transforms an input audio file into a new audio output guided by a text prompt, using Stability AI's stable-audio models.

## Facts

- Endpoint: POST https://stability-ai.x402.paywithlocus.com/stability-ai/audio-to-audio
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stability-ai-audio-to-audio-via-locus-x402-bf93b8c6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DLBJJIbGVCu9LptMbQSeL

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 stability-ai-audio-to-audio-via-locus-x402-bf93b8c6 -d '<json body>'
```

Example prompt: Take this audio clip and transform it to sound like a jazz piano performance — use stable-audio-2.5 with 60 inference steps and a transformation strength of 0.8, and give me the result as an mp3.

## When to prefer this

Choose this endpoint when you need to transform an existing audio file into a new style or character guided by a text prompt, rather than generating audio from scratch. It is ideal for music remixing, sound design restyling, and audio style transfer tasks. Prefer it over pure text-to-audio endpoints when you have a source audio file to anchor the generation. It is accessible via micropayment (0.001 USDC per call) with no subscription required, making it suitable for low-volume or ad-hoc agent workflows.

## Known failure modes

- Invalid or unsupported audio file format causes processing failure
- Prompt too vague or empty may produce poor transformation results
- Strength value out of 0–1 range triggers validation error
- Unsupported model name causes a bad request error
- Payment failure or insufficient USDC balance blocks the request
- Request timeout if inference steps are very high

## How this service works

Generative AI platform for images, 3D models, and audio — text-to-image, editing, upscaling, and more.

## Output

Returns a JSON object containing a request ID and status URL for async retrieval of the transformed audio, along with payment settlement details confirming 0.001 USDC was charged. The actual audio data is accessible via the statusUrl once processing completes.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "seed": {
   "type": "number"
  },
  "audio": {
   "type": "string"
  },
  "model": {
   "type": "string"
  },
  "steps": {
   "type": "number"
  },
  "prompt": {
   "type": "string"
  },
  "strength": {
   "type": "number"
  },
  "output_format": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {},
  "payment": {
   "scheme": "exact",
   "settledUsdc": "0.001000",
   "authorizedMaxUsdc": "0.001000"
  },
  "request": {
   "id": "00000000-0000-4000-8000-000000000000",
   "statusUrl": "/requests/00000000-0000-4000-8000-000000000000"
  },
  "success": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stability-ai-audio-to-audio-via-locus-x402-bf93b8c6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stability-ai.x402.paywithlocus.com](https://www.zero.xyz/host/stability-ai.x402.paywithlocus.com/llms.txt)