Leaderboard: pay a tiny fee to appear on a ranked scoreboard (?name=, ?url=, ?note=)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xf74f2020aC3d73F2Bf5ee0F8Bf635475eA881319",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "POST",
        "queryParams": {
          "name": "",
          "note": "",
          "url": ""
        },
        "type": "http"
      },
      "output": {
        "example": {
          "message": "",
          "status": ""
        },
        "type": "json"
      }
    },
    "schema": {
      "properties": {
        "input": {
          "properties": {
            "queryParams": {
              "properties": {
                "name": {
                  "description": "Display name to list (max 80 chars).",
                  "type": "string"
                },
                "note": {
                  "description": "Optional short note.",
                  "type": "string"
                },
                "url": {
                  "description": "Optional URL to associate with the listing.",
                  "type": "string"
                }
              },
              "required": [
                "name"
              ],
              "type": "object"
            }
          }
        },
        "output": {
          "properties": {
            "example": {
              "properties": {
                "message": {
                  "type": "string"
                },
                "status": {
                  "type": "string"
                }
              },
              "type": "object"
            }
          }
        }
      }
    }
  }
}

curl "https://lab.paidapis.net/api/leaderboard/list"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://lab.paidapis.net/api/leaderboard/list");
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://lab.paidapis.net/api/leaderboard/list")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header