Retrieve change alerts for monitored URLs

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x24FAcafEB49b4e3FACF0B3e69604A2F4640c9bf2",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "1000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "info": {
      "description": "Get change alerts for URLs you are monitoring. Returns detected changes with before/after hashes.",
      "iconUrl": "https://memoryapi.org/icon.png",
      "input": {
        "method": "GET",
        "queryParams": {
          "limit": "10",
          "url": "https://api.memoryapi.org/health",
          "user_id": "my-agent"
        },
        "schema": {
          "properties": {
            "limit": {
              "type": "string"
            },
            "url": {
              "type": "string"
            },
            "user_id": {
              "type": "string"
            }
          },
          "required": []
        },
        "type": "http"
      },
      "output": {
        "example": {
          "alerts": [
            {
              "changed_at": "2026-05-29T22:00:00Z",
              "url": "https://api.memoryapi.org/health"
            }
          ],
          "count": 1,
          "success": true
        }
      },
      "serviceName": "MemoryAPI Cron",
      "tags": [
        "scheduling",
        "cron",
        "automation",
        "agents"
      ]
    },
    "schema": {
      "properties": {
        "input": {
          "properties": {
            "method": {
              "enum": [
                "GET"
              ],
              "type": "string"
            }
          },
          "required": [
            "method"
          ]
        }
      }
    }
  }
}

curl "https://cron.memoryapi.org/x402/cron/alerts"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://cron.memoryapi.org/x402/cron/alerts");
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://cron.memoryapi.org/x402/cron/alerts")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header