Apex Sightline™ Vision EHR

FHIR R4 partner API for optometry and ophthalmology — refraction, diagnostics, VisionPrescription, optical fulfillment, and vision claims (type: vision).

OpenAPI Spec api.parkerapex.com/fhir/R4

Live API Status — Apex Sightline™ Vision EHR

Probing production endpoints…

Rate Limits & SLA

Rate limit

2,000 FHIR req/min

Burst

80 req/sec

Uptime SLA

99.9%

Support

Business hours · 4h

P95 latency

< 400ms exam

Retention

Vision 7 years

FHIR Resources

Required Sightline set

vision

Claim Type

FHIR Claim.type code

GPID

Auth

Actor + subject headers

Lake

Storage

HAPI R4 longitudinal

Capabilities

FHIR Catalog

355+ platform types incl. vision

Identity / GPID

Patient & partner actor resolution

Velocity RCM

Vision claims & EOB lifecycle

OpenAPI contract

Machine-readable spec: apex-sightline-v1.openapi.yaml

Download apex-sightline-v1.openapi.yaml →

Integration toolkit

Sandbox API Playground OpenAPI Try-it-out Certification Webhooks

Postman collection (23 requests)Import the same JSON into Insomnia

Official SDKs

Generate TypeScript client →·Python →·All SDKs

Apex Sightline (Vision) certification track

12 required items · platform + product-specific checks

Full checklist →

First authenticated API call in sandbox
OAuth or API key with least-privilege scopes
FHIR R4 read against sandbox lake
GPID boundary headers on write paths
Webhook HMAC-SHA256 verification implemented
Webhook idempotency by delivery ID

+9 more on the certification page

Complete all required items before production go-live

Webhook events for Apex Sightline (Vision)

Subscribe at /webhooks — verify HMAC-SHA256 signatures

Event catalog →

sightline.prescription.fulfilledSightline

Optical order fulfilled — lenses/frames dispensed.

{
  "event": "sightline.prescription.fulfilled",
  "vision_prescription_id": "VP-001",
  "patient_gpid": "APX-1A2B3C4D",
  "fulfillment_status": "completed"
}

Service categories

vision_examrefractionretinal_imagingoctvisual_fieldframeslensescontactsoptical_fulfillment

Operational REST API

Sightline EHR workflows beyond FHIR — exam sessions, refraction capture, optical fulfillment, and imaging ingest.

GET/POST /sightline/v1/exams

Vision exam sessions

POST /sightline/v1/exams/{id}/refraction

Refraction → FHIR Observations

POST /sightline/v1/prescriptions/{id}/fulfill

Optical fulfillment

POST /sightline/v1/imaging/studies

OCT / visual field ingest

Required GPID headers

X-Apex-Actor-GPID: PLX-ORG-…

X-Apex-Subject-GPID: APX-…

X-Apex-Source: sightline-partner-001

First FHIR read guide

Golden bundle contract

Reference implementation bundle for Sightline conformance testing.

sightline-golden-bundle.r4.json