Detect meaningful content changes in any URL, monitor website and web page chang
Detect meaningful content changes in any URL, monitor website and web page changes, check page freshness, filter common boilerplate/noise, and return a change signal for AI agents.
Answeringour last check, 2026-09-29
1 of 1checks answered this week
470 msmedian answer time
$0.001listed price per call
$0.001price 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://fresh402.kirilllabs.workers.dev/v1/check
| Category | Search and research |
|---|---|
| Provider host | fresh402.kirilllabs.workers.dev |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 3 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-29 | valid payment request | 402 | $0.001 | 470 ms |
Example input (from the provider)
{
"body": {
"url": "https://example.com"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"url": {
"description": "Absolute HTTP or HTTPS URL to monitor. Send the same URL again to detect meaningful page changes since the previous Fresh402 snapshot.",
"format": "uri",
"type": "string"
}
},
"required": [
"url"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"changed": {
"type": "boolean"
},
"check_count": {
"type": "integer"
},
"checked_at": {
"type": "string"
},
"content_length": {
"type": "integer"
},
"fetch_time_ms": {
"type": "integer"
},
"final_url": {
"type": "string"
},
"first_seen": {
"type": "boolean"
},
"noise_detected": {
"type": "boolean"
},
"normalizer_version": {
"type": "integer"
},
"raw_changed": {
"type": "boolean"
},
"rebaselined": {
"type": "boolean"
},
"snapshot_saved": {
"type": "boolean"
},
"url": {
"type": "string"
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}