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HTTP/3 Support Change Watch
x402
HTTP/3 Support 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 domain for HTTP/3 and modern-transport support changes, returning current status, a changed flag, and before/after field diffs compared to your last call.
Price / call$0.02
Success—
StatusUnknown
How this service works
Change watch for http3 support: runs the check and compares it with the result from your previous call for the same domain (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 http/3 and modern-transport support changes. $0.01 per check.
Output
Returns the current HTTP/3 and modern-transport support answer for the domain, a boolean 'changed' flag indicating whether the result differs from the previous call (stored up to 90 days), a list of exactly which fields changed with their before and after values, and the timestamp of when the status was last seen.
Example use cases
CDN migration HTTP/3 rollout tracking
“I just migrated mystore.com to a new CDN that claims to support HTTP/3 — check right now whether HTTP/3 is active and tell me if that status changed compared to the last scan.”
Scheduled protocol compliance monitoring
“Every day, check whether api.mybusiness.com's HTTP/3 support has changed from what it was yesterday, and flag any fields that are different with before and after values so I can log them.”
Competitor transport protocol benchmarking
“Has competitor-site.com turned on HTTP/3 since the last time we checked? Show me the current support status and highlight exactly what changed, if anything.”
Technical details
Endpoint
GEThttps://intel.rallylive.ca/watch/monitor/http3When to prefer
Choose this endpoint when you need to detect changes in HTTP/3 or modern transport support over time, not just a one-shot status check. It is ideal for scheduled agents that need to react when a domain flips its HTTP/3 configuration, because it handles state comparison server-side (90-day retention) and returns precise field-level diffs rather than requiring the agent to store and compare snapshots itself.
Side effects
- Domain is unreachable or does not resolve — check may return an error or unavailable status
- First-time call for a domain has no prior baseline — 'changed' will be false or indeterminate
- Domain actively blocks probes — results may be inaccurate
- Stale baseline if prior result is older than 90 days — comparison resets
- Payment not attached or insufficient — x402 payment required error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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