# Delx Quality Image Upscaler (HQ)

> Delx Quality Image Upscaler (HQ) is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).

Quality-upscales a single still image up to 4 megapixels for $0.01 USDC, returning the enlarged image and a SHA-256 receipt.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/upscale-image-hq
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/delx-quality-image-upscaler-hq-33f02869
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NSkmlx2Cbbfuw-xp1_sfX

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 delx-quality-image-upscaler-hq-33f02869 -d '<json body>'
```

Example prompt: Can you quality-upscale this image to up to 4 megapixels? Here's the base64-encoded JPEG — I need the best resolution possible, not just a cheap 2x resize.

## When to prefer this

Choose this endpoint when you need a high-quality single-image upscale to up to 4 megapixels and want pay-per-use pricing ($0.01 USDC) with no API key or subscription. Prefer it over a generic 2x cheap pass when output quality matters — e.g. for print, display, or downstream vision tasks. Best suited for still images under 256 KiB base64; not appropriate for video frames in bulk or when a simple fast resize suffices.

## Known failure modes

- Image exceeds 256 KiB base64 input limit — request rejected with size error
- Image would exceed 4 MP after upscaling — capped or rejected
- scale or model fields provided — rejected as unsupported
- Malformed or non-image base64 string — decoding error
- Payment of $0.01 USDC not fulfilled — 402 Payment Required response

## How this service works

Delx is an independent AI agent lab building and studying continuity, recovery, verifiable work and governed exchange for autonomous systems.

## Output

Returns the upscaled image (up to 4 megapixels) encoded in a deliverable format, along with a SHA-256 receipt confirming the transformation. The output reflects a high-quality enlarge pass, not a simple bicubic 2x resize.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "image_base64": {
   "type": "string",
   "maxLength": 349550,
   "minLength": 1,
   "description": "One base64 still up to 256 KiB. Quality upscale is capped at 4 MP; scale/model fields are rejected."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "image_url": "https://api.delx.ai/api/v1/generated-upscales/example.png",
  "sale_price_usdc": 0.01
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/delx-quality-image-upscaler-hq-33f02869/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)