post
https://ingest.spektr.com/v1/record/relations
Links two or more client records together (e.g. a company and its beneficial owners). Pass an array of { from, to } pairs where each side is identified by spektrId or reference. The request is atomic: all relations are created together or none are, if any validation fails. Validation rules: both records must exist, from and to cannot be the same record, duplicate relations are rejected, and the resulting graph must remain acyclic.