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Entity Extract Heuristic Change Watch
x402
Entity Extract Heuristic Change 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 a webpage's heuristic-extracted named entities for changes over time, returning a diff of added/removed/modified entity fields between the current and previous check.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for entity extract heuristic: 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 named-entity candidates from a page without an llm changes. $0.01 per check.
Output
Returns the current heuristic-extracted named entity candidates from the page, a boolean `changed` flag indicating whether results differ from the previous call for the same URL, a field-level diff showing exactly which entity fields changed with before and after values, and the timestamp of when the previous result was last seen. The previous result is retained for 90 days.
Example use cases
Tracking executive mentions on a competitor page
“Watch https://competitor.com/leadership every day and tell me whenever the list of named people or organizations detected on that page changes — show me exactly what was added or removed.”
Alerting on entity changes in a news article
“Monitor https://news-site.com/article/123 for me and ping me if any named entities like politicians or companies mentioned in the article are updated or replaced compared to the last check.”
Auditing entity drift on a product listing
“Set up a recurring check on https://store.example.com/brands and alert me if the brand names or organizations detected on the page change — I want to see the before and after values for any fields that differ.”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/watch/page/entitiesWhen to prefer
Choose this endpoint when you need to detect changes in heuristic (non-LLM) named entity extraction from a specific URL over time without requiring an LLM-powered analysis. It is ideal for scheduled monitoring workflows where you want lightweight, cost-effective ($0.01/check) entity change detection with field-level diffs. Prefer it over one-shot entity extraction when change detection and historical comparison are the primary goals.
Side effects
- URL is unreachable or returns a non-200 response, causing the check to fail with no result
- No previous result exists yet (first call), so `changed` will be false or undefined
- The 90-day history window has expired, losing the prior comparison baseline
- The page uses heavy JavaScript rendering, reducing heuristic entity extraction accuracy
- Transient network errors may cause incomplete or missing entity extraction
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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