# SKYFIRE Domain Appraisal API

## Overview
AI-agent-friendly domain valuation service. Submit any domain name,
receive a structured appraisal report including estimated value range,
comparable sales, brandability score, SEO potential, and acquisition
recommendation.

## Endpoint
`GET https://pay.cn402.com/appraise?domain={domain}`

## Authentication
Requires Skyfire pay token (PAY or KYA-PAY) in `skyfire-pay-id` header.

## Pricing
$9.99 per call.

## Example Request
```
curl "https://pay.cn402.com/appraise?domain=example.com" \
  -H "skyfire-pay-id: <your_jwt_token>"
```

## Response Schema
```json
{
  "domain": "example.com",
  "appraisal": {
    "value_low_usd": 1200,
    "value_mid_usd": 2800,
    "value_high_usd": 5800,
    "confidence": "medium"
  },
  "factors": {
    "length": 7,
    "tld": "com",
    "memorability_score": 85,
    "brandability_score": 80,
    "keyword_value": "low",
    "seo_potential": "moderate"
  },
  "comparables": [
    {"domain": "samplx.com", "sold_price_usd": 3920, "sold_year": 2024}
  ],
  "recommendation": "buy",
  "reasoning": "Solid 7-character com domain..."
}
```

## Without Payment
Calling without a valid token returns HTTP 402 with payment instructions.

## Powered by
Skyfire payment protocol — autonomous agent commerce infrastructure.