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Agent Preflight — Change Check
x402
Agent Preflight — Change Check is a paid API for AI agents from preflight.lorensaisolutions.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).
Compares a previous snapshot of a URL or page against its current state to detect changes and recommend actions for AI agents.
Price / call$0.05
Success—
StatusUnknown
How this service works
Paid URL analysis, CAPTCHA and login detection, API discovery, product intelligence, change monitoring, and batch preflight for AI agents and agent swarms.
Output
Returns a JSON object with a boolean 'changed' field, an array of 'changes' each describing the field name, before and after values, and a 'recommendedAction' string (e.g. 'notify_user') advising the agent on next steps.
Example use cases
Example prompt
“Check if anything has changed on that product page since last time — here's the previous snapshot I saved: '<previousSnapshot content>' — and tell me what changed and whether I should notify the user.”
Technical details
Endpoint
POSThttps://preflight.lorensaisolutions.com/v1/change-checkWhen to prefer
Use this endpoint when an AI agent needs to determine whether a previously captured page or data snapshot has changed over time, especially for price monitoring, content tracking, or e-commerce intelligence workflows. Prefer this over generic scraping endpoints when you already have a baseline snapshot and need field-level diff output with an actionable recommendation.
Side effects
- Missing or malformed previousSnapshot returns a validation error
- Snapshot too large or unparseable may cause a processing error
- Network timeout if the current page is slow to load
- No changes detected returns changed: false with an empty changes array
- Invalid URL in snapshot may result in a fetch failure
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| previousSnapshot | string |
Output
Schema · Response
{
"type": "json",
"example": {
"changed": true,
"changes": [
{
"after": "44.00",
"field": "priceDetected",
"before": "49.00"
}
],
"recommendedAction": "notify_user"
}
}Tags
x402
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