# Lucky CIN Harmony Grade

> Lucky CIN Harmony Grade is a paid API for AI agents from lucky-x402.onrender.com, paid per call via x402, $1.2/call, status unknown (last checked 2026-10-11).

Scores audio/musical features (tension, harmony, pitch) and returns a creative-quality verdict for post-generation media quality control

## Facts

- Endpoint: POST https://lucky-x402.onrender.com/x402/harmony-grade?utm_source=zero.xyz
- Price: $1.2/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/lucky-cin-harmony-grade-edfbdae2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qbcn1HMM9YeSg_aFYjMns

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 lucky-cin-harmony-grade-edfbdae2 -d '<json body>'
```

Example prompt: Can you run a harmony grade on my generated audio — it has a tension of 0.7, harmony of 0.85, and pitch of 0.6 — and tell me if it passes quality check?

## When to prefer this

Choose this endpoint when you need automated creative quality control or harmonic grading on post-generated audio or music assets described by tension, harmony, and pitch features. It is particularly useful in AI media pipelines where generated audio needs a pass/fail verdict before publishing or downstream processing. Prefer it over generic ML classification APIs when your use case specifically involves musical/harmonic feature grading.

## Known failure modes

- Missing required 'features' object returns validation error
- Missing tension, harmony, or pitch sub-fields may cause computation failure
- Out-of-range feature values (e.g. outside 0-1) may return unexpected results
- Payment failure or insufficient USDC balance blocks the request
- Service unavailable on Render free tier cold starts causing timeout

## How this service works

crypto-intelligence verdicts (CIN) + creative-judgment/QC + post-gen media-ops — agent-facing

## Output

Returns a verdict object containing a harmony grade or creative quality score based on the provided tension, harmony, and pitch feature values. The exact schema is a generic object, likely containing numeric scores, letter grades, or pass/fail verdicts for the audio asset's harmonic characteristics.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "features"
 ],
 "properties": {
  "features": {
   "type": "object",
   "description": "object{tension,harmony,pitch}"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/lucky-cin-harmony-grade-edfbdae2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from lucky-x402.onrender.com](https://www.zero.xyz/host/lucky-x402.onrender.com/llms.txt)