# Clash of Coins Pricing

Machine-readable pricing reference for agents comparing checkout options.

```json
{
  "version": 1,
  "service": "Clash of Coins Checkout",
  "currency": "USD",
  "paymentCurrency": "USDC",
  "canonicalCatalog": "https://mpp.clashofcoins.app/catalog",
  "discoveryResources": "https://mpp.clashofcoins.app/discovery/resources",
  "finalPriceAuthority": "quote_or_402_payment_challenge",
  "retrySemantics": {
    "x402": {
      "unpaidStatus": 402,
      "paymentHeader": "PAYMENT-SIGNATURE",
      "preserveRequestBody": true
    },
    "mpp": {
      "unpaidStatus": 402,
      "paymentHeader": "Authorization: Payment",
      "preserveRequestBody": true
    }
  },
  "items": [
    {
      "id": "sale:370",
      "title": "Sale #370",
      "minUsd": "0.009",
      "maxUsd": "0.009",
      "currency": "USD"
    },
    {
      "id": "sale:371",
      "title": "Sale #371",
      "minUsd": "0.09",
      "maxUsd": "0.09",
      "currency": "USD"
    },
    {
      "id": "sale:372",
      "title": "Sale #372",
      "minUsd": "0.9",
      "maxUsd": "0.9",
      "currency": "USD"
    },
    {
      "id": "sale:373",
      "title": "Sale #373",
      "minUsd": "0.27",
      "maxUsd": "0.27",
      "currency": "USD"
    }
  ]
}
```

- Canonical catalog: https://mpp.clashofcoins.app/catalog
- Discovery resources: https://mpp.clashofcoins.app/discovery/resources
- Quote endpoints should be treated as final price authority before buy.

| Source | Title | Min USD | Max USD |
| --- | --- | --- | --- |
| sale:370 | Sale #370 | 0.009 | 0.009 |
| sale:371 | Sale #371 | 0.09 | 0.09 |
| sale:372 | Sale #372 | 0.9 | 0.9 |
| sale:373 | Sale #373 | 0.27 | 0.27 |

## Notes

- Values are discovery-time snapshots and can change by offer lifecycle.
- For x402 and MPP, final payable amount is the challenge/quote amount at transaction time.
- For personalized shop offers, provide exactly one recipient: nickname or wallet address.