One Degree INTERLINK API

INTERLINK is a FHIR R4 API for social determinants of health (SDOH) referral management.

Base URL

https://fhir.1degree.org/fhir/{tenantPartition}

Each integration partner is assigned a tenant partition that scopes all data access. Your partition name will be provided when your integration is enabled.

Supported workflows

• Referral workflow — retrieve and update SDOH referrals via Task

Error handling

Code	Meaning	Action
200	Success	Process normally.
401	Invalid or missing token	Re-authenticate and retry.
403	Forbidden	Token tenant does not match URL tenant, or insufficient scope.
404	Not found	Check resource ID and partition name in the URL.
422	Validation failure	Review OperationOutcome. Confirm required fields and profiles.
500	Server error	Retry after delay. Contact INTERLINK support if persistent.

Error responses include an OperationOutcome resource with a diagnostics field describing the specific issue.