Is this URL live, and has this page changed?
Is this URL live, and has this page changed? Check a URL is up and its data is fresh before your agent acts on its contents, to detect stale data, or to decide whether to invalidate a cache. A freshness oracle and point-in-time uptime and change-detection check: returns HTTP status, Last-Modified/ETag, a content SHA-256 fingerprint, and whether the content changed versus a prior hash. Returns a signed attestation.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
22 msmedian answer time
$0.02listed price per call
$0.02price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://402oracle.com/verify/freshness
| Category | Everything else |
|---|---|
| Provider host | 402oracle.com |
| Networks | eip155:137, eip155:42161, eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.02 | 22 ms |
Example input (from the provider)
{
"body": {
"url": "https://example.com/data.json"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$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"
}