custom_bars_catalog before querying custom bars when you do not already know the exact stored threshold or date range.
The catalog is authoritative for current availability. Documentation examples show valid request shapes but do not promise that every threshold is materialized for every historical window.
Tool Reference
custom_bars_catalog
Discover stored custom-bar configurations, thresholds, ranges, and source runs.
Use
The catalog is read-only. It does not download archives, build bars, or trigger a historical job.