Grade-or-Not Decision Engine: answers 'will grading this trading card make me money?' by c

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x642e8a7C289381f24f0395e0539f0bA41c74Cc1B",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "100000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "GueVKFK4VNe4LYvMoYAKpnJe8s7Yar6FF3r1f92gfm9y",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "100000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:4663",
    "payTo": "0x642e8a7C289381f24f0395e0539f0bA41c74Cc1B",
    "asset": "0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168",
    "amount": "100000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "card_name": "Base Set Charizard Holo",
          "predicted_grade": 8.5
        },
        "type": "http"
      },
      "output": {
        "example": {
          "data": {
            "roi_pct": 85.3,
            "verdict": "🟢 GRADE IT"
          },
          "status": "ok",
          "tool": "grade_or_not_engine"
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "card_name": {
                  "description": "Card name to evaluate",
                  "type": "string"
                },
                "predicted_grade": {
                  "description": "Expected PSA grade (0 = auto-estimate)",
                  "type": "number"
                },
                "raw_price": {
                  "description": "Current raw value in USD (0 = auto-lookup)",
                  "type": "number"
                },
                "service_tier": {
                  "description": "PSA tier: economy, regular, express, super_express, walk_through",
                  "type": "string"
                }
              },
              "required": [
                "card_name"
              ],
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "data": {
                  "type": "object"
                },
                "status": {
                  "type": "string"
                }
              },
              "required": [
                "status"
              ],
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://oracle.the-undesirables.com/api/v1/grade-or-not"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://oracle.the-undesirables.com/api/v1/grade-or-not");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://oracle.the-undesirables.com/api/v1/grade-or-not")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header