Determine whether the bounded normalized representation of one public HTTPS webp
Determine whether the bounded normalized representation of one public HTTPS webpage has changed since a caller-held baseline. Returns fingerprints and change status, not continuous monitoring, alerts, webhooks, semantic importance, AI summaries, or site-wide crawling.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
217 msmedian answer time
$0.005listed price per call
$0.005price 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://api.agentmercantile.com/v1/web-change-snapshot
| Category | Search and research |
|---|---|
| Provider host | api.agentmercantile.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 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 | $0.005 | 217 ms |
Example input (from the provider)
{
"body": {
"url": "https://example.com/"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"baseline": {
"description": "Optional caller-held hashes and completeness flags. Never the previous webpage body.",
"type": "object"
},
"url": {
"description": "One absolute public HTTPS URL on port 443. No credentials.",
"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": {
"additionalProperties": true,
"properties": {
"baseline": {
"description": "Caller-held compact comparison evidence when supplied.",
"type": "object"
},
"comparison_scope": {
"type": "string"
},
"comparison_status": {
"enum": [
"BASELINE",
"UNCHANGED",
"CHANGED",
"INCONCLUSIVE"
],
"type": "string"
},
"limitations": {
"items": {
"type": "string"
},
"type": "array"
},
"machine": {
"enum": [
"VM07"
],
"type": "string"
},
"methodology_version": {
"enum": [
"web-change-snapshot-0.1.0"
],
"type": "string"
},
"requested_url": {
"type": "string"
},
"status": {
"enum": [
"OK",
"PARTIAL",
"HOLD"
],
"type": "string"
}
},
"required": [
"status",
"machine",
"methodology_version",
"requested_url",
"comparison_status",
"limitations"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}