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TD Agent Utility · Change Check (Website & Deployment Verification)
x402
TD Agent Utility · Change Check (Website & Deployment Verification) is a paid API for AI agents from tdagentutility.co.uk, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-16).
Checks whether a previously-seen URL has changed by comparing current HTTP, DNS, TLS, and Chromium snapshot data against a stored baseline, returning a diff and pass/fail status.
Price / call$0.006
Success—
StatusUnknown
How this service works
Independent website and deployment verification for AI agents: HTTP, DNS, TLS and Chromium screenshot evidence. Three deterministic tools, x402 V2 Base USDC.
Output
A JSON object containing a boolean 'changed' flag, a 'differences' object describing what changed, the 'current' snapshot data, a 'version' counter, a 'result_status' of PASS or FAIL, any 'warnings', the 'checked_at' timestamp, and a 'first_seen' boolean indicating if this is the first check for the URL.
Example use cases
Post-deploy sanity check for a web app
“We just pushed a new release to https://staging.mycompany.com — can you run a change check to confirm something actually changed from the previous snapshot and that there are no TLS or DNS warnings?”
Third-party vendor site integrity monitoring
“I need to know if our payment gateway landing page at https://checkout.vendor.io looks any different from the last time we verified it — check HTTP, DNS, TLS and screenshot for any differences.”
Unexpected website tampering alert
“Can you check whether https://www.mybrand.co.uk has been tampered with since the last verification? I want to see if anything in the HTTP response, DNS records, TLS cert, or visual screenshot has changed.”
Technical details
Endpoint
POSThttps://tdagentutility.co.uk/v1/change-check?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need deterministic, evidence-based change detection across multiple signals (HTTP, DNS, TLS, and visual screenshot) rather than a simple HTTP diff. It is ideal for post-deployment verification, third-party site integrity checks, and tamper detection where a versioned history and structured diff — not just a status code — are required.
Side effects
- URL is unreachable or returns a non-200 status — result_status may be FAIL with warnings
- DNS resolution failure for the target domain
- TLS certificate error or mismatch on the target host
- No previous baseline exists — first_seen will be true and differences will be empty
- Chromium screenshot capture times out for slow-loading pages
- Invalid or missing URL parameter in the request body
Output
Schema · Response
{
"type": "json",
"example": {
"tool": "change_check",
"changed": false,
"current": {},
"version": 0,
"previous": null,
"warnings": [],
"checked_at": "2026-10-15T00:00:00Z",
"first_seen": false,
"differences": {},
"result_status": "PASS"
}
}Tags
x402
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