OptionalconcurrencyOptional maximum number of concurrent count requests
JQL field name, e.g. 'issuetype', 'status', 'priority', 'assignee'
OptionalfromLower date bound accepted by Jira JQL, e.g. '-30d' or '2026-06-01'
OptionaljqlAdditional JQL combined with generated metric clauses using AND
OptionalprojectsProject keys or IDs to restrict the metric to
OptionaltoUpper date bound accepted by Jira JQL, e.g. '2026-06-30'
OptionalvalidateWhether Jira should validate each generated JQL query
Bucket values to count for the field
Facet count request. Jira Search has no REST group-by, so values are counted with one count-only JQL query per bucket.