Be ready the moment it opens
Before claiming accuracy, we disclose what was measured.
How we measure reference and target clocks and calculate their estimated ranges.
Independent clock models
The target HTTP clock and UTC reference clock each have their own monotonic anchor. Neither is used as a substitute for the other.
±U is estimated uncertainty
It combines round-trip delay, retained low-delay sample residuals, and drift uncertainty over time. Coverage is validated separately against controlled ground truth.
The web measurement boundary
The web measures only our reference endpoint and CORS-verified targets. We do not build an arbitrary URL proxy.
What is not frozen yet
Sample counts, uncertainty thresholds, and request modes per external target are finalized through repeat pre-release measurement. Provisional values are not product accuracy claims.