# Redox FHIR R4 API

**Canonical:** https://apis.io/apis/redox/redox-fhir-r4-api/  
**Provider:** Redox — https://apis.io/providers/redox/  
**Base URL:** https://api.redoxengine.com/fhir/R4/{destination-slug}/{environment-type}  
**Documentation:** https://docs.redoxengine.com/api-reference/fhir-api-reference/

Redox FHIR R4 API is one of 5 APIs that [Redox](https://apis.io/providers/redox/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include FHIR, HL7, Healthcare, Notification, and Patient Access. The published artifact set on APIs.io includes API documentation, an API reference, authentication docs, and rate-limit docs.

The Redox FHIR R4 API exposes HL7 FHIR R4 resources for healthcare data exchange between connected systems, supporting FHIR notifications, queries, and writeback messages over an OAuth 2.0-secured base URL templated per destination and environment (Development, Staging, Production). Resources align with USCDI requirements and let digital health vendors search, read, create, and update Patient, Practitioner, Observation, Condition, MedicationRequest, Encounter, DocumentReference, and other clinical resources against EHRs and networks connected through Redox.

## Machine-readable artifacts (5)

- **Documentation** — https://docs.redoxengine.com/api-reference/fhir-api-reference/
- **APIReference** — https://docs.redoxengine.com/api-reference/fhir-api-reference/
- **Authentication** — https://docs.redoxengine.com/api-reference/redox-data-model-api/authenticate-an-oauth-api-key/
- **ErrorCodes** — https://docs.redoxengine.com/api-reference/error-handling-and-responses/
- **RateLimits** — https://docs.redoxengine.com/api-reference/quotas-and-constraints/

## Other Redox APIs (4)

- [Redox FHIR API](https://apis.io/apis/redox/redox-fhir-api/)
- [Redox Data Model API](https://apis.io/apis/redox/redox-data-model-api/)
- [Redox Platform API](https://apis.io/apis/redox/redox-platform-api/)
- [Redox HL7 v2 Library](https://apis.io/apis/redox/redox-hl7-v2-library/)

## Tags

FHIR, HL7, Healthcare, Notification, Patient Access, Query, R4, USCDI, Writebacks

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/redox/redox-fhir-r4-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/redox/.