https://ez-qr-generator.com/a2a/generate

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x67CE366B323b47561C6a1154Bc633440822497b4",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "maxTimeoutSeconds": 300
  },
  {
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "payTo": "7V7wYJ2CP1p57fi9L6MoomQsJTXVyrYRc7QAnFtRm8FQ",
    "amount": "1000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "discoverable": true,
    "info": {
      "input": {
        "body": {
          "dotStyle": "circle",
          "format": "svg",
          "primaryColor": "#9900ff",
          "url": "https://example.com"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "properties": {
            "body": {
              "additionalProperties": true,
              "properties": {
                "activeTab": {
                  "description": "Free: 'url', 'text'. Paid: 'wifi', 'vcard', 'email', 'phone', 'sms', 'whatsapp', 'facebook', 'instagram', 'twitter', 'youtube', 'tiktok', 'linktree', 'location', 'paypal', 'dbl', 'crypto', 'spotify', 'linkedin', 'telegram', 'github', 'discord', 'twitch', 'pinterest'",
                  "type": "string"
                },
                "dotStyle": {
                  "enum": [
                    "square",
                    "circle",
                    "hex",
                    "diamond"
                  ],
                  "type": "string"
                },
                "format": {
                  "description": "Output format. SVG vector is paid ($0.001 USD via x402)",
                  "enum": [
                    "png",
                    "svg"
                  ],
                  "type": "string"
                },
                "primaryColor": {
                  "description": "Custom hex color (e.g. #00f0ff)",
                  "type": "string"
                },
                "url": {
                  "description": "Target URL or text to encode",
                  "type": "string"
                }
              },
              "required": [
                "url"
              ],
              "type": "object"
            }
          },
          "type": "object"
        }
      },
      "type": "object"
    }
  }
}

curl "https://ez-qr-generator.com/a2a/generate"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://ez-qr-generator.com/a2a/generate");
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://ez-qr-generator.com/a2a/generate")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header