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price-extract-watch
x402
price-extract-watch is a paid API for AI agents from intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Monitors price data extracted from a webpage and reports whether it has changed since the last check, including before/after field diffs.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for price extract: runs the check and compares it with the result from your previous call for the same url (kept 90 days), returning the current answer, changed true/false, exactly which fields changed with before/after values, and when it was last seen. Call it on a schedule to be told when price extraction from a page changes. $0.01 per check.
Output
Returns the current price extraction result from the page, a boolean 'changed' flag indicating whether any price data differs from the previous call for the same URL, a list of exactly which fields changed with their before and after values, and a timestamp of when the data was last seen. Results are retained for 90 days per URL.
Example use cases
Competitor pricing surveillance
“Watch the pricing page at https://rivalstore.com/pricing every hour and tell me the moment any price changes — I want to see exactly which plan prices went up or down and by how much.”
E-commerce product price alert
“Check https://shop.example.com/product/123 for me and tell me if the price is different from the last time it was checked, including what it was before and what it is now.”
SaaS subscription plan monitoring
“Monitor https://software.io/plans for any changes to their subscription prices — if anything changes, show me the before and after values so I can update our competitive analysis.”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/watch/site/pricesWhen to prefer
Choose this endpoint when you need to detect changes in price data specifically extracted from a webpage, as opposed to monitoring general page content or non-price fields. It is ideal for scheduled agent workflows where you want structured diff output (changed fields with before/after values) rather than a raw snapshot. Prefer it over generic change-watch tools when the target page contains pricing information you want to track with minimal per-check cost ($0.01/check).
Side effects
- URL is inaccessible or returns a non-200 status — extraction fails with an error
- No previous result exists for the URL — first call returns current data with changed=false or null diff
- Page has anti-scraping measures that block price extraction
- Price data is rendered client-side via JavaScript and cannot be statically extracted
- Stored comparison result has expired after 90 days, losing diff baseline
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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