> ## Documentation Index
> Fetch the complete documentation index at: https://help.elationhealth.com/llms.txt
> Use this file to discover all available pages before exploring further.

# API Reference

> Connect your tools and systems to Elation EHR using the REST API or FHIR API.

Connect your tools and systems to Elation programmatically. Choose the REST API for full-featured integrations, the FHIR API for standards-based data exchange, or HL7 for lab and imaging result delivery.

<CardGroup cols={2}>
  <Card title="REST API" icon="square-terminal" href="https://docs.elationhealth.com/reference/introduction">
    Build custom integrations with Elation — authentication guides, endpoint reference, and request/response schemas.
  </Card>

  <Card title="FHIR API" icon="hospital" href="/articles/fhir/getting-started-with-standardized-api">
    Access standardized patient data using FHIR R4 for interoperability and certified health IT use cases.
  </Card>

  <Card title="HL7 Interface" icon="flask" href="/articles/hl7/hl7-integration-overview">
    Send lab results, radiology reports, and lab orders to Elation using HL7 ORM and ORU message specifications.
  </Card>
</CardGroup>