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Signal Forge Studio - Offer Change Check
x402
Signal Forge Studio - Offer Change Check is a paid API for AI agents from signalforgestudios.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-17).
Takes a snapshot of a public URL's offers, prices, CTAs, and headlines, then detects changes from a previously established baseline.
Price / call$0.02
Success—
StatusUnknown
How this service works
Signal Forge Studio makes printable wall art and small digital kits for online sellers.
Output
Returns a JSON object indicating the change status (e.g. 'baseline_created' or changes detected), a list of detected changes, and a full snapshot of the URL including offers, prices, CTAs, headlines, final URL, capture timestamp, and whether HTML was truncated. Note: the caller is responsible for retaining snapshots; no background monitoring is performed.
Example use cases
Etsy listing offer monitoring
“Check if the offers and prices on my Etsy shop landing page at https://myetsyshop.etsy.com have changed since I last set a baseline — I want to know if anything shifted in the CTAs or pricing.”
Competitor landing page change detection
“Snapshot https://competitorstore.com/sale and tell me if their headline, prices, or call-to-action buttons are different from the baseline we captured last week.”
Sales page integrity verification
“I need to verify that my digital product sales page at https://mysellerkits.com/offer still shows the correct pricing and offer phrases — can you compare it against the existing baseline and flag any changes?”
Technical details
Endpoint
POSThttps://signalforgestudios.com/x402/offer-change-check?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a lightweight, on-demand check of whether a specific public URL's offers, prices, CTAs, or headlines have changed since a previously established baseline. Ideal for online sellers, marketers, or agents that need point-in-time change detection without setting up continuous background monitoring infrastructure. Best when the caller manages their own snapshot history.
Side effects
- URL is inaccessible or returns a non-200 status — snapshot cannot be captured
- Page requires authentication or blocks automated access — content may be empty or incomplete
- No prior baseline exists — first call creates a baseline rather than comparing
- HTML content is too large and gets truncated — some offers or prices may be missed
- Dynamic JavaScript-rendered content may not be captured if the crawler does not execute JS
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"status": "baseline_created",
"changes": [],
"snapshot": {
"url": "https://example.com",
"ctas": [],
"offers": [],
"prices": [],
"version": 1,
"final_url": "https://example.com",
"headlines": [],
"captured_at": "2026-09-22T00:00:00Z",
"html_truncated": false
},
"limitations": [
"Caller retains snapshots. No background monitoring."
]
},
"meta": {
"example_only": true
},
"success": true
}
}Tags
x402
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