ARNS and Delius

This integration service provides APIs to: - get the limitations (exclusions and restrictions) for a user - get case data for a CRN (date of birth, gender, main offence, start date, conviction date)

Business need

To allow the Assess Risks and Needs (ARNS) service to prevent unauthorised access to a probation case.

Data dependencies

This depends on Delius for up-to-date information on the restrictions and exclusions applied to a user.

Context Map

API Access Control

API endpoints are secured by roles supplied by the HMPPS Auth client used in the requests

API Endpoint	Required Role
/users/access	PROBATION_API_ARNS_USER_ACCESS
/arns/{crn}	PROBATION_API_ARNS_CASE_DETAIL

API Reference

• API Reference

This page was last reviewed on 9 February 2026. It needs to be reviewed again on 9 May 2026 by the page owner #probation-integration .