Retrieve the cumulative experiment results captured by the clickhouse:snapshot_experiment_metrics scheduled job. Each snapshot stores the running value of every metric (users, subscribe, conversion_to_subscribe, etc.) for every variant at the moment of capture together with statistical-significance fields (p_value, effect_size, absolute/relative deltas and confidence intervals).

The response groups rows by period_index -> variants[] -> metrics{} by default so it can be plotted directly. Pass format=flat to receive raw ClickHouse rows instead. Use latest=true to fetch only the most recent snapshot. Filter by metric, variant_index, strict_experiment_filter, and the period_from / period_to window when needed.