Screen one asset class without pulling all 320 markets: mark price, funding rate and open

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x25a8b697Da5c0bAF698Fd6BD9701B5e825214145",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "226DYoWb2e6uYxDkFp7vK8jZhzzh2VNvHH6DgbDsNueC",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "algorand:wGHE2Pwdvd7S12BL5FaOP20EGYesN73ktiC1qzkkit8=",
    "payTo": "ZVZV3J2VQNLTH6MNLOL5IHZECJQVXVSVAK3NNJA6FD7LLNZ5NRHQAIL2J4",
    "asset": "31566704",
    "amount": "10000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "pathParams": {
          "asset_class": "crypto"
        },
        "type": "http"
      },
      "output": {
        "example": {
          "asset_class": "crypto",
          "count": 194,
          "markets": [
            {
              "asset_class": "crypto",
              "coin": "BTC",
              "day_volume": 2824000602.9866595,
              "dex": "",
              "funding": 0.0000298097,
              "mark_px": 77302,
              "open_interest": 36419.31138,
              "symbol": "BTC"
            }
          ],
          "updated_at": "2026-08-23T01:39:43.769674+00:00"
        },
        "type": "json"
      }
    },
    "routeTemplate": "/markets/class/:asset_class",
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET",
                "HEAD",
                "DELETE"
              ],
              "type": "string"
            },
            "pathParams": {
              "type": "object"
            },
            "queryParams": {
              "properties": {},
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://whaletape.xyz/markets/class/:asset_class"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://whaletape.xyz/markets/class/:asset_class");
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://whaletape.xyz/markets/class/:asset_class")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header