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extract-comments-as-json-watch
x402
extract-comments-as-json-watch is a paid API for AI agents from page.intel.rallylive.ca, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-20).
Monitors a web page's HTML comments for changes and returns current extracted comments as JSON along with a diff of what changed since the last check.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for extract comments as json: runs the check, compares it with the result from your previous call for the same url (kept 90 days) and returns the current answer, changed true/false, the fields that changed with before/after values, and when it was last seen. Schedule it to be alerted when this changes. $0.02 per check.
Output
Returns a JSON object containing the current extracted HTML comments from the target page, a boolean 'changed' flag indicating whether the comments differ from the previous call, a list of fields that changed with before and after values, and a timestamp of when the page was last seen. The prior result is stored for up to 90 days for comparison.
Example use cases
Track hidden developer annotations on competitor site
“Watch https://competitor.com/product-page for any changes in the HTML comments — I want to know if they update any developer notes or hidden metadata embedded in the page source.”
Alert on CMS template comment changes
“Monitor https://myclient.com/homepage and tell me if the HTML comments change — our CMS injects build version info in comments and I need to know when a new deployment happens.”
Detect comment-based A/B test markers
“Check https://store.example.com/landing for me and compare the HTML comments to the last snapshot — I'm tracking whether their A/B test identifiers hidden in comments have rotated.”
Technical details
Endpoint
GEThttps://page.intel.rallylive.ca/watch/page/comments/json?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to monitor a specific web page's HTML comments over time and detect when they change, rather than doing a one-off extraction. It is ideal for automated alerting workflows where you want to schedule recurring checks and receive structured diffs. Prefer this over a bulk or single-extract endpoint when change detection and historical comparison (not just current content) is the primary goal.
Side effects
- Target URL is unreachable or returns non-200 status — extraction fails and no comparison is made
- No previous result stored (first call for a URL) — 'changed' may not be meaningful, baseline is established
- Page has no HTML comments — returns empty results with changed false
- URL changes redirect target, causing unexpected comparison baseline mismatch
- Rate limiting or payment failure at $0.02 USDC per call prevents execution
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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