# Waystar Authorization & Referral API

**Canonical:** https://apis.io/apis/waystar/waystar-prior-authorization-api/  
**Provider:** Waystar — https://apis.io/providers/waystar/  
**Base URL:** https://priorauthorizationapi.waystar.com/1.0/  
**Documentation:** https://www.waystar.com/our-platform/financial-clearance/authorizations/

Waystar Authorization & Referral API is one of 7 APIs that [Waystar](https://apis.io/providers/waystar/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Prior Authorization, Referrals, and X12 278. The published artifact set on APIs.io includes API documentation.

Automates prior authorization and referral determination and status, modeled on the X12 278 health care services review request/response. Covers submitting authorization requests, checking auth/referral status, and returning determinations. Waystar layers RPA and payer-portal automation on top of EDI where payers lack a transaction. Modeled from public product docs.

## Machine-readable artifacts (2)

- **Documentation** — https://developer.waystar.com/
- **Documentation** — https://www.waystar.com/our-platform/financial-clearance/authorization-referral-status/

## Other Waystar APIs (6)

- [Waystar Eligibility Verification API](https://apis.io/apis/waystar/waystar-eligibility-verification-api/)
- [Waystar Patient Estimation API](https://apis.io/apis/waystar/waystar-patient-estimation-api/)
- [Waystar Claim Management API](https://apis.io/apis/waystar/waystar-claim-management-api/)
- [Waystar Claim Status API](https://apis.io/apis/waystar/waystar-claim-status-api/)
- [Waystar Remittance & ERA API](https://apis.io/apis/waystar/waystar-remittance-era-api/)
- [Waystar Denial & Appeal Management API](https://apis.io/apis/waystar/waystar-denial-management-api/)

## Tags

Prior Authorization, Referrals, X12 278

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