Index onlineMerchant portal
Api Endpoint

402oracle

Website uptime and change check: is this URL up right now, and has the page changed? Fetches the URL and returns the HTTP status, Last-Modified and ETag headers, a SHA-256 fingerprint of the content, and whether it changed versus a hash you pass in. Use it to check a site is live, detect stale data, monitor a page for changes, or decide whether to invalidate a cache before your agent acts on what it says. Returns a signed attestation.

Open interactive test console

Offering

Provider
402oracle.com
Method
POST
Offering type
Api Endpoint
Transport type
http
Category
Performance
Delivery
Not provided
Pricing model
Not provided
x402 version
2

Endpoint context

URL
https://402oracle.com/verify/freshness
MIME type
Not provided
First seen
2026-10-16T01:50:06.715Z
Last seen
Tags
uptime-check, website-monitoring, change-detection, stale-data, url-check

Website

Payment pricing

x402 payment terms are the authoritative price for calling this endpoint.

Payment option 1
0.02 USDC
Atomic price: 20000 · Network: eip155:8453 · Asset: USDC · Scheme: exact
Payment option 2
0.02 USDC
Atomic price: 20000 · Network: eip155:137 · Asset: USDC · Scheme: exact
Payment option 3
0.02 USDC
Atomic price: 20000 · Network: eip155:42161 · Asset: USDC · Scheme: exact
Raw x402 terms
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "20000",
    "payTo": "0x7a19cd388c7f69145fef09b960853e0a429b6f4a"
  },
  {
    "scheme": "exact",
    "network": "eip155:137",
    "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
    "amount": "20000",
    "payTo": "0x7a19cd388c7f69145fef09b960853e0a429b6f4a"
  },
  {
    "scheme": "exact",
    "network": "eip155:42161",
    "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
    "amount": "20000",
    "payTo": "0x7a19cd388c7f69145fef09b960853e0a429b6f4a"
  }
]

Observed health

Status
Healthy
Latest latency
40 ms
Average latency
171 ms
HTTP status
204
Last checked
Reachability
100% over 14 checks

Latency is measured to the first response headers. A reachable result does not verify response accuracy or merchant identity.

Input schema

{
  "properties": {
    "body": {
      "properties": {
        "prior_hash": {
          "description": "Optional prior SHA-256 hex to compare against",
          "type": "string"
        },
        "url": {
          "description": "Full URL including https://",
          "type": "string"
        }
      },
      "required": [
        "url"
      ],
      "type": "object"
    },
    "bodyType": {
      "const": "json"
    },
    "method": {
      "enum": [
        "POST"
      ]
    },
    "type": {
      "const": "http"
    }
  },
  "required": [
    "type",
    "method"
  ],
  "type": "object"
}

Output schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "properties": {
    "input": {
      "properties": {
        "body": {
          "properties": {
            "prior_hash": {
              "description": "Optional prior SHA-256 hex to compare against",
              "type": "string"
            },
            "url": {
              "description": "Full URL including https://",
              "type": "string"
            }
          },
          "required": [
            "url"
          ],
          "type": "object"
        },
        "bodyType": {
          "const": "json"
        },
        "method": {
          "enum": [
            "POST"
          ]
        },
        "type": {
          "const": "http"
        }
      },
      "required": [
        "type",
        "method"
      ],
      "type": "object"
    },
    "output": {
      "properties": {
        "example": {
          "type": "object"
        },
        "type": {
          "type": "string"
        }
      },
      "required": [
        "type"
      ],
      "type": "object"
    }
  },
  "required": [
    "input"
  ],
  "type": "object"
}