{
  "x402Version": 2,
  "id": 27106,
  "slug": "27106",
  "resource": "https://402oracle.com/verify/freshness",
  "description": "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.",
  "type": "http",
  "serviceName": "402oracle",
  "resourceType": "Monitoring",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x7a19cd388c7f69145fef09b960853e0a429b6f4a",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "20000",
      "amountUsd": 0.02,
      "maxTimeoutSeconds": 300
    },
    {
      "scheme": "exact",
      "network": "eip155:137",
      "payTo": "0x7a19cd388c7f69145fef09b960853e0a429b6f4a",
      "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
      "amount": "20000",
      "amountUsd": 0.02,
      "maxTimeoutSeconds": 300
    },
    {
      "scheme": "exact",
      "network": "eip155:42161",
      "payTo": "0x7a19cd388c7f69145fef09b960853e0a429b6f4a",
      "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
      "amount": "20000",
      "amountUsd": 0.02,
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "properties": {
      "example": {
        "type": "object"
      },
      "type": {
        "type": "string"
      }
    },
    "required": [
      "type"
    ],
    "type": "object"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "url": "https://example.com/data.json"
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "attestation": {
              "confidence": 0.98,
              "result": {
                "changed": false,
                "content_sha256": "9f86d081884c7d65",
                "reachable": true,
                "status": 200
              },
              "subject": {
                "url": "https://example.com/data.json"
              },
              "type": "freshness_verification"
            },
            "signature": {
              "alg": "ES256",
              "jwks": "/.well-known/jwks.json"
            }
          },
          "type": "json"
        }
      },
      "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"
      }
    }
  },
  "tags": [
    "uptime-check",
    "website-monitoring",
    "change-detection",
    "stale-data",
    "url-check",
    "bazaar"
  ],
  "sourceHost": "402oracle.com",
  "lastUpdated": "2026-10-11T12:02:45.421Z",
  "quality": {
    "calls30d": 8,
    "uniquePayers30d": 5,
    "lastCalledAt": "2026-10-11T12:02:45.216Z"
  },
  "metadata": {
    "serviceName": "402oracle",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "url": "https://example.com/data.json"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "attestation": {
                "confidence": 0.98,
                "result": {
                  "changed": false,
                  "content_sha256": "9f86d081884c7d65",
                  "reachable": true,
                  "status": 200
                },
                "subject": {
                  "url": "https://example.com/data.json"
                },
                "type": "freshness_verification"
              },
              "signature": {
                "alg": "ES256",
                "jwks": "/.well-known/jwks.json"
              }
            },
            "type": "json"
          }
        },
        "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"
        }
      }
    }
  },
  "liveness": {
    "reliability": null
  },
  "verified": false,
  "featured": false,
  "provider": {
    "host": "402oracle.com",
    "manifest_name": "402oracle.com",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-10-14T01:15:01.050Z"
  },
  "exampleResponse": {
    "example": {},
    "type": "string"
  }
}