# Stability AI Fast Upscale via Locus x402

> Stability AI Fast Upscale via Locus x402 is a paid API for AI agents from stability-ai.x402.paywithlocus.com, paid per call via x402, $0.023/call, status unknown (last checked 2026-09-13).

Quickly upscales a source image to higher resolution using Stability AI, paid per-call via x402 micropayment protocol.

## Facts

- Endpoint: POST https://stability-ai.x402.paywithlocus.com/stability-ai/upscale-fast
- Price: $0.023/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stability-ai-fast-upscale-via-locus-x402-18f9c9c4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FRSb9vrMyLOW-r30jOCny

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-fast-upscale-via-locus-x402-18f9c9c4 -d '<json body>'
```

Example prompt: Can you upscale this image to a higher resolution and give me the result as a PNG? Here's the source image.

## When to prefer this

Choose this endpoint when you need fast, AI-powered image upscaling with per-call micropayment billing via the x402 protocol, especially useful for agent workflows that need pay-as-you-go image enhancement without subscription overhead. Prefer over batch or slower upscaling services when turnaround speed matters and you want Stability AI quality at low cost ($0.023/call).

## Known failure modes

- Invalid or missing image input returns an error with no output
- Unsupported output_format value causes request rejection
- Payment failure or insufficient funds prevents processing
- Image too large or in unsupported format causes rejection
- Network timeout during upscaling may require polling the status URL

## 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 the upscaled image data, a payment record with settled USDC amount, and a request ID with a status URL for async tracking. The upscaled image is embedded in the 'data' field and the output format matches the requested jpeg/png/webp choice.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "image": {
   "type": "string"
  },
  "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-fast-upscale-via-locus-x402-18f9c9c4/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)