Raw observation history for any publicly listed x402 endpoint: discovery snapshots (listed/delisted/relisted, price changes, payTo changes) and probe time-series over the requested window (1-90 days). Every probe carries its outcome ('status': success, dns_error, timeout, http_error, ...), 'httpStatus', an 'error' detail and an 'excluded' flag; excluded probes carry no endpoint signal (rate limits, unresolved URL templates, resolver outages on our side) and never count as downtime. A 'probeSummary' aggregates the window: counts by status, longest failure streak, and a per-day failure breakdown.

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