Market rankings with price, volume, market cap — filterable by category

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x7dd5Be069f2d2eAd75eC7C3423B116fF043c2629",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "2000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "eip155:4326",
    "payTo": "0x7dd5Be069f2d2eAd75eC7C3423B116fF043c2629",
    "asset": "0xFAfDdbb3FC7688494971a79cc65DCa3EF82079E7",
    "amount": "2000000000000000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "Gzehfseq1k9AcHFSoV7qHmDGQx92nLMw78XXdqVWQQWa",
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "amount": "2000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "input": {
        "method": "GET",
        "queryParams": {
          "category": "decentralized-finance-defi",
          "currency": "usd",
          "limit": 100,
          "order": "market_cap_desc",
          "page": 1
        },
        "type": "http"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            },
            "queryParams": {
              "additionalProperties": false,
              "properties": {
                "category": {
                  "description": "Filter by category ID",
                  "example": "decentralized-finance-defi",
                  "type": "string"
                },
                "currency": {
                  "default": "usd",
                  "description": "Fiat currency for pricing",
                  "example": "usd",
                  "type": "string"
                },
                "limit": {
                  "default": 100,
                  "description": "Number of results (1-250)",
                  "example": 100,
                  "type": "number"
                },
                "order": {
                  "default": "market_cap_desc",
                  "description": "Sort order",
                  "example": "market_cap_desc",
                  "type": "string"
                },
                "page": {
                  "default": 1,
                  "description": "Page number (1-500)",
                  "example": 1,
                  "type": "number"
                }
              },
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  }
}

curl "https://x402engine.app/api/crypto/markets"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://x402engine.app/api/crypto/markets");
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://x402engine.app/api/crypto/markets")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header