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Cache Headers Check Watch
x402
Cache Headers Check 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 URL's HTTP caching headers over time and returns a diff when they change, compared against the previous check result stored for 90 days.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for cache headers check: 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 caching headers check changes. $0.01 per check.
Output
Returns the current cache headers check result for the URL, a boolean 'changed' flag indicating whether results differ from the previous call, a field-level diff listing exactly which headers changed with before/after values, and a timestamp of when the result was last seen. Previous results are retained for 90 days.
Example use cases
CDN cache config drift alert
“Keep an eye on https://shop.mystore.com and let me know whenever its Cache-Control or Vary headers change — I want to know exactly what changed and what the values were before and after.”
Post-deployment cache header validation
“After we deployed this morning, check whether the caching headers on https://app.mycompany.com/api/products have changed compared to what they were before, and show me any differences.”
Scheduled SEO cache monitoring
“Set up a recurring check on https://myblog.com so I get alerted any time the cache headers change — include the before and after values for each field that's different.”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/watch/site/cache-headersWhen to prefer
Use this endpoint when you need to detect changes in HTTP caching headers for a specific URL over time, especially on a scheduled basis. Prefer it over a one-shot cache headers check when you want automatic diffing and change detection without managing state yourself. It is ideal for alerting workflows, CI/CD post-deploy validation, or SEO monitoring where you care about the delta between checks rather than just the current state.
Side effects
- URL is unreachable or returns a non-200 response — check may fail or return empty headers
- No previous result stored (first call) — 'changed' will be false or indeterminate with no diff
- URL missing from input — request rejected with validation error
- Rate limits or payment issues — call rejected before check is performed
- Headers present but identical to previous call — changed returns false with empty diff
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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