# Rules in the API

To apply a [rule](/en/transactional/rules/) during an analysis via API, provide its name in the `analyze.rule.name` field of the request. The rule must have an **active** published version to be executed.

## When the rule is not applied

In the scenarios below, the platform uses the [default analysis configuration](/en/transactional/analysis/) instead of the rule:

- Rule name blank or non-existent.
- Existing rule, but without an active published version.
- Error while processing the rule.

In all these cases, the analysis proceeds normally — only the rule's custom recommendation is not applied.